Very well even if the quality has deteriorated over the years on the model; cheaper materials.
This feature, however, nothing wrong, the ergonomics on top of your hand!
Have had this for a month and so far I am very satisfied. Considerably more comfortable in the long run than a conventional mouse. Good to have in your bag and use the laptop, because it is a trackball requires not just something special material. The quality seems ok, but'll see how long it lasts. Previously had a trackball with the ball in the middle, prefer this, which also has a scroll wheel.
This was so good so I bought two for a while, one at home and one at work.
The reason for the trackball was because I started to get a sore shoulder with regular mouse which I drive with all these years.
You control with your thumb & must say that I was considering to return it after a week. But as someone wrote on a website, once you have learned and practiced the thumb is extremely comfortable! Now I've gotten used to it and do not want to switch back.
It can certainly be improved in many ways (eg, roller wheel is a bit "old fashioned", "back" and "forward" is OK but not perfect) but still deserve a 10 from me in the current version.
Incredibly stylish combination if you buy eg keyboard Logitech K810, and that you get more desktop space (no mouse pad, no "musradie" needed)
The negative is that you need additional accompanying usb-dongel/plugg for example, computer / (plate on Microsoft Surface), it is not Bluetooth on this (as it is on the K810) but Logitech's own protocol.
If you are unsure, buy on the open purchase & try at least a week if you have not had a trackball before.
Having used a number of trackballs over the years. For the most Logitech.
M570 is the one I enjoyed best with and unlike user slurping so I am very happy with my M570. It has never malfunctioned, has good range and is not particularly disturbing.
Have had my M570 for 3 years now and I will soon buy another one, because I think this is the best on the very limited market for trackballs.
Sad that you seem to have had such bad luck, slurping.
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