Logitech MX Ergo Wireless Trackball Mouse, Bluetooth Or 2.4GHz with Unifying USB-Receiver, Adjustable Trackball Angle, Precision Scroll-Wheel, 910-005179 - Black (Graphite)

Best mouse around, perfect for my needs. My main interest in this was the Easy-Switch function, which unfortunately connects to only 2 devices as opposed to 3, but all the ball-designs seem to be limited to only 2 devices.I wasn't in a rush, so I waited for it to be discounted and eventually bought it for £63, which I think might've happened partially because the MX Ergo S was released shortly after. The MX Ergo S seems to be the same as the Ergo, but has a USB-C port instead of Micro-USB, and the S also uses a Logi Bolt receiver, whereas I preferred to have the standard Ergo's Unifying receiver because it's the same as what my keyboard uses, meaning they can both connect to the same receiver.I appreciate the Unifying receiver as an option so I can connect my mouse and/or keyboard easily to devices that perhaps wouldn't normally accept a connection via Bluetooth, or if I'm wanting to quickly connect and disconnect without messing around with Bluetooth pairing.A minor problem for me is that unlike older models, it has a rechargeable battery as opposed to a removable AA battery. Personally I would've preferred the AA battery, both for when I travel by aeroplane, but more importantly as batteries eventually deteriorate, and replacing a AA is easier than a built-in rechargeable battery, but it's not like that's something that affects me day-to-day anyway.

I'd bought a couple of Aptico trackballs, one for the office and one for the laptop in another room that I use with Blackstar software for managing my Blackstar ID:30 amp. But the one for the office was because I have an anti-static mat on my desk because I am an electronic engineer and my office is also my lab. A conventional mouse is quite 'grippy' on this surface so is difficult for accuracy with electronic/technical drawings. So I thought, 'make the mouse stationary, work the cursor with the thumb and increase the resolution as and when necessary. Hence the Aptico but, every other day, I have to have the ball out for cleaning and lubricating including its cavity. I found Mr. Sheen to be quite good in this respect but why does the ball stick so quickly?I have a logitech k750 wireless keyboard. And I now have a logitech MX 50 trackball, not cheap at eighty quid, but read on. I am working from home using a client laptop securely linked to my remote desktop PC at the client's office. The MX 50 offers the facility to share the USB dongle with my own wireless keyboard. Thus the MX 50's own dongle can be attached to my client's PC. There is a switch just in front of the scroll wheel that enables me to switch between doing stuff on my own PC or doing stuff on the client PC (enormous monitor attached to the client laptop so the laptop screen is virtually redundant). Wow! But it gets better. If I'm drawing, in Visio, say, for the customer or Altium at home, when greater cursor accuracy is required there is a thumb-operated switch just behind the scroll ball that increases resolution or, in other words, slows the cursor down thus allowing greater accuracy. So, you've zoomed what you are trying to do by whatever means in your application and then made the position of the desired object more precise with this button on the 'mouse'. There's more; you're an engineer, say, and you're in a website where you've selected a datasheet or something which isn't what you were hoping for and you have to wander the cursor back up to top left reverse arrow to go back to the previous page? Not so with the MX 50. It has two buttons left of the scroll wheel, easily accessible, and the nearest of these is a 'go back' button which is the one we want! Forward of this is a 'go forward' button which I must confess I've hardly used but nice to have anyway. The scroll wheel has left-right click too for those apps that support horizontal scrolling. But here is the best bit: scroll wheel stickiness. I've been using this for a month and I haven't had to have the ball out yet for a clean and lubrication. Really! But the Aptico ball was out pretty much every other day for a clean and a lube (including its cavity). I'm right-handed and the right arm of my office chair hangs over the surface of my desk so my fingers fall upon the mouse or trackball in the manner of a pianist. But not quite. The MX 50 has a (magnetically locked) 20 degree tilt facility which I do use; I just put the trackball at the ideal drop hand position on my desktop and pretty much all I have to move is my thumb. Like scrolling through your phone contacts, the cursor will move fast if you move the wheel fast. Charge via the micro-USB port. Allegedly, a 4-minute charge will give you a day and a full-charge lasts a month. Looks like I should put mine on an overnight!OVERALL VERDICT:Typical Logitech quality. Absolutely fit for purpose, clearly designed by a human and not a computer. The tactility of the left/right switches is just right, the click of of the scroll wheel is just right, the weight of the 'ball' is spot on and it hasn't stuck yet, the tiltability (magnetically 'locked) is spot on. This has been designed by people who might have to use it. It has been bought by me who does use it for >12 hours per day and it is simply superb - my wrist stays more-or-less stationary, my thumb does the walking and my fingers the switching. Bliss.

For more than 2 years, I've bought ergonomic keyboards, a keyboard tray, adjustable desk and so on. All of these decisions are to maximize my comfort while working on my desk. At one point, I thought I turn to my attention to my mouse, as I was beginning to develop pain around my wrist.I tried ergonomic vertical mice and they were great for awhile but found them to be just as bad as I would overstretch my wrist when navigated the cursor to the left. Then tried the Kensington trackball devices; I like the precision of having large trackballs but I couldn't adapt to the click buttons due to their locations. Then I tried Logtech M570 and it was promising but I eventually settled on the more premium MX Ergo.I bought this product in Dec 2017, so after 10 MONTHS of use here is my review.Really Comfortable : The M570 and MX Ergo feels more like traditional mice as my hand would settle the same way as before. The MX Ergo is far more comfortable because of its tilt angle. At 20 degrees, my wrist is far more relaxed compared to the M570's flat, horizontal feel.Premium Feel : The MX Ergo is heavy so it feels like a premium product. Due to its weight, it hardly moves on my desk. But much of that weight is on the magnetic base plate, so when I remove it the product is as light as a low priced mice so it loses much of its premium feel. I like its matte finish but as expected the left click button has become shiny after repetitive use.Connectivity : As per usual with Logitech, it is supplied with a multi-device unifying dongle and can connect to 2 dongles (note: it only comes with one). This is very useful as I use one dongle at work and another at home. I wish there are more connections as I sometimes connect it to my laptop's bluetooth - to do so, I have had to re-pair it. I also wish it had a storage holster for the dongle - cheaper products have one.Cursor Navigation is Great : It took a bit of time to adapt to the MX Ergo - but not too long. For one thing, I have had to develop a aim when I move the cursor with my thumb rather than my wrist. I also had to coordinate my thumb's ball control with my index finger's click press lifting my thumb away from the ball before I click so that the cursor doesn't move (thumb-lift-finger-click). But I found moving the cursor with the trackball far more comfortable than flexing my wrists. And because the trackball device stays where it is, I don't over extend my wrist. Furthermore, moving the cursor from one end of the screen to the another is one or two flicks of the thumb, rather than two wrist strokes with a mouse (or worst, over extending the wrist) - this is such a comfort when working with large screens.Cleaning my balls :) Unlike modern mouse where it uses optical or laser sensors, the downside with having a ball is that from time to time it needs maintenance. The trackball picks up skin oil from my thumb and at times I have had to wash & polish the ball and clean the insides of the device. It certainly harks back to the days when I've had to clean my mouse ball on a regular basis; the good news is not as bad as that! I've had the MX Ergo for 10 months, and I've clean the ball 3 times. That not due to any functional failure; I cleaned it because i noticed that I lost some of the ball's smooth running.Charged for long time: I use my MX Ergo daily and I haven't had to charge it on a regular basis. I've only ran out of juice once after not charging it for a 3 months after having a new job.I miss my mouse (sometimes) : Because I use mice for decades, my cursor aim is better with them then a trackball. This became obvious when I started drawing a flow chart; my thumb was fatiguing when drawing and aligning shapes. Thumb-lift-finger-click coordination is not necessary with mice.