perixx PERIMICE-720 Wireless 2.4 GHz and Bluetooth Ergonomic Trackball Mouse, Adjustable Angle, 2 DPI Level, White

This is a great trackball mouse. Comes with 2 different magnetic bases to adjust the height and angle of the mouse. There are 2 DPI settings although I find the high setting to be way too fast for me. The button to quickly switch between windows is handy. The fact that it requires 2 AAA batteries can be seen as a positive or a negative. Theres no unreplaceable battery that you have to charge so you can just swap the batteries out but it does mean occasionally buying some unless you have some rechargable AAA ones. The main negative though and why this only got 4 stars is because of the scroll wheel. I already sent one back because when I try to scroll down a page it would randomly scroll up and down. The thing that points to this being a problem is that the replacement I got sent also has the same problem. I couldn't be bothered sending it back again, and it does seem to have mostly gone away after using it for some time, but this is a thing that would might put people off buying one. Apart from that I have had no other issues and the wireless works great using the included receiver.

excellent

The Logitech M570 wireless trackball is my go-to for pointing devices now - it dramatically reduces arm movement across your desk, and only requires the footprint of the device to rest on to be usable. My one criticism is that the M570 is only available in a wireless variant; for something that (usually) lives on my desk, and unlike a mouse does not need to move from its spot, the wireless aspect adds more trouble than it solves.This trackball is very similar in design - it uses a thumb ball, has navigation buttons and even an adjustable base angle - but it's wired USB. So no batteries and no wireless interference. The ergonomics are very similar and it's extremely comfortable to use day to day. It has a few additional features over the Logitech trackball too - first it has adjustable DPI sensitivity, it has an Alt-Tab button to switch windows mounted below the scroll wheel, and the wheel tilts for horizontal scrolling. These are all very nice additions. It has a generous USB cable length and very clicky buttons, so you have positive feedback.The downsides are that it's not quite as nice quality plastic as Logitech use - the build quality seems less when you go from one to the other. It's much lighter and not as keen to stay in one place on your desk. The ball is also lighter; this means it has less momentum - one of my favourite tricks is to flick the ball and have it carry the cursor all the way across my large screen (or dual screens). This works, just not as well as the Logitech one. For cleaning, I can extract the ball from the Logitech with just a finger, but I have to use a pen or similar to pop the ball out of the Perixx one. The Back button is easy to push, but the Forward button is located closer to the edge of the mouse than the Logitech one, so it's a little harder to click. Also, the tilt wheel is quite firm and requires a good push to engage horizontal scrolling, needing a firm grip on the mouse. One final difference, the Perixx uses a red LED optical sensor, whereas the Logitech and most newer mice have moved onto invisible optics; it's not a problem, just a bit interesting to see what feels like 'old' tech.Overall, not perfect, but an excellent trackball for those who want the ergonomics of the M570 with a wired connection.

I got this to use on a smal desk with a laptop. It performs that way very well. It comes with two different clip-on bases to put the mouse at steeper angles (the lower one was the more comfortable) and has several prgrammable buttons.The only issue I had was that it's basically a mechanical mouse -- there are roller wheels under the ball that require regular de-linting to keep it working efficiently. The ball is easy to remove but I reckon this is something that could only get worse over time. I eventually got a larger desk and this went ina drawer. It's still a useful thing to have and better than a spare "standard" mouse.

This is the first time I've seriously used a trackball and I'm pretty pleased with this model.The ball itself feels really nice - I got used to it much quicker than I expected, and it's easy to move accurately around the screen. (It worked better with "Enhance pointer precision" disabled in Windows.)The buttons are better suited to those with bigger hands, but mostly don't feel too bad after a few days. The scroll wheel is quite chunky - it's OK for scrolling, but pressing it down (to act as a middle button) requires an uncomfortable level of force.The little "mission control" button behind the scroll wheel is actually ergonomically pretty convenient - but that brings me to my last point...While Perixx supplies a driver for the 520 (wired) model which lets you change what the buttons do, there isn't one for the 720 (wireless).So the average non-technical user is going to be stuck with the default button assignments. If you're happy to use AutoHotKey then you can find some scripts online to remap most of the buttons - but the "Mission Control" button is more of a pain, because it actually presents itself to the operating system as a keyboard device that sends Alt and Tab keystrokes when you press it. You can get around this using the AutoHotInterception library in conjunction with AutoHotKey - I now have mine set up as a middle mouse button, but come on Perixx! Users shouldn't really have to go to those technical lengths to do what should be quite basic configuration.(As far as I can tell, with the 520 wired model you can reprogram all the buttons *except* the "mission control" - you still have to do some tinkering with AHK and AHI to program that one.)I'm still happy with my purchase, but it would be really improved by quite a small amount of software investment from Perixx.