Logitech Ergo M575 Wireless Trackball Mouse - Easy Thumb Control, Precision and Smooth Tracking, Ergonomic Comfort Design, for Windows, PC and Mac with Bluetooth and USB Capabilities, Black, Medium

I've been using the Kensington Orbit trackball for a while ( 3-4 years) and got this as a replacement. Compared to the orbit, this has buttons very similar to a regular mouse (an actual middle click instead of a combination). Unlike my initial apprehensions, the thumb trackball is actually more comfortable than the index and middle finger trackball on the Orbit.The other reviewers in this product page appear to be transitioning from regular mice and I figured there is some value in a review from someone who has used trackballs for a while.I didn't care much about the ergonomic tilt feature, my main motivation in using trackballs is to reduce the strain in my shoulder and right upper back. The M575 and trackballs in general help quite a bit with this. As an added bonus you can place the unit in tight spaces where a regular mouse would be hard to move around and also on surfaces that aren't mice friendly. After a few days of use, the M575 appears to be very comfortable to use, even more than the Orbit.As for the use case, I use it for CAD on a 27 inch screen and everyday point-and-click. While it was not used for gaming, I suspect that it should be quite feasible to use for casual non-competitive gaming.For large cursor movements, you flick the ball so that it spins freely in the direction you need. For fine movements, you'd control by holding the ball with the thumb. I didn't feel any strain in my thumb, but I think it's important to not overextend your thumb while using the mouse. Keep the sensitivity high enough that fine finger movements will let you use the pointer nicely but low enough that it's not too difficult.It can connect via bluetooth as well as the Logitech dongle, which allows you to switch between computers easily. It uses a standard Logitech usb dongle, which means that if you lose it, you could reconfigure the one from another Logitech unit (doesn't have to be this mouse model). I think you can also configure the dongle to connect to a Logitech keyboard as well, simultaneously.Now, coming to the downsides:1. It's optimized for the right hand. If you're ambidexterous or a leftie, you're SOL.2. The 2 extra buttons are mapped to forward and back. You need to keep the logitech software running to reconfigure this. --It appears to not remember the change--This can be an issue when you work in an environment that disallows installation of software like logi-plus that downloads additional stuff from the internet. It's also an issue on Linux where logi-plus isn't officially supported.My preference is to map these buttons to page up and down but on this mouse, it's not that viable.3. The trackball needs to be periodically cleaned. You'd need to take it out, wipe the insides of the cavity and the ball using a damp cloth or a tissue wetted with IPA (alcohol). Then lightly lube the ball with silicone grease or maybe vaseline.4. The trackball doesn't give you the finest of movements. It's slightly jerky. You'd need to find a sweetspot with the sensitivity settings where this is not an issue for what work you do.

I have been a long time user of an older version of this mouse. The older one was lagging on my new mac, and even worse when the mac is connected to an external display. This was my concern before buying this product, but it worked surprisingly well. Connecting it to the mac was a breeze, no need for an adapter and the battery is already provided in the device. I was up and running within seconds. Highly useful for long hours on the desk, but you have limited gesture functionality compared to the magic keyboard or trackpad if you have one, so I recommend keeping both around for different types of workflows. All in all, recommend this product.

Good Mouse, Have made the purchase after a lot of research as I was not so sure if I will like it. As It is different from regular mouse.In case of a regular mouse we need some space - flat surface for the mouse to move around on the table etc., Here the Mouse is stationary and the track ball moves.Best use is when you are sitting on a sofa and working with your feet up on the center table. I have also used it in restricted places like the seat of the Aeroplane.Extremely useful and comfortable.Only one issue is it is a bit bulky ,, but it needs to be bulky so that the palm is in a natural resting position.Need to get used to it... will take a few hours and then you are all SET !!!

Been using the mouse for last few years..a perfect Ergo design. Fits perfectly in the palm. You can work tirelessly without elbow or shoulder movement. The item is rugged..travel a lot carrying the mouse...couple of times the tracker ball fell of during security check..but continues to work. The battery life is also long. Strongly recommend..!!

This mouse is fantastic and quite easy to use. It just takes a few minutes to get used to scrolling with your thumb. Most likely I'll never go back to using a regular mouse again with all the hand movement. For work, casual usage, I highly recommend it. Since I don't game on my Mac, I don't know how it'll be for gaming. I used an app to map the buttons on the Mac.

Great!

Don't purchase it. This model often starts getting into problems:1. The scroll doesn't work properly, it sometimes scrolls up and then scrolls down when we try to scroll down.2. The trackball often accumulated dirt and you have to take the trackball out to clean it.This is the reason why the warranty for this product is only 1 year instead of the usual 2yr warranty.

ergonomic, easy to use

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