Summary: It's a shame there aren't more options to choose from where thumb-operated trackballs are concerned. They're my favorite type of input device and the best I can do is buy old used Microsoft Optical Trackballs, which tend to last and last for me. Logitech has no competition in this area.
Pros: Great design, great concept, wireless is nice
Cons: poor construction. I've owned about 5 of these either purchased new or replaced under warranty. Each one has inevitably failed to operate properly in under 12 months or so (yes, before the first set of batteries even starts dying out). I always get the infamous double click issue where a single c...
Summary: The switches in the mouse started double clicking after a few months of use. Sometimes taking the battery out and holding the buttons to discharge the capacitors helps but the double click starts up again shortly after.
Pros: Smooth operation, trackball removal easy for cleaning, wireless is nice
Cons: Cheap Switches. after a few months it starts double clicking when you don't want it too
Pros: None. I don't know how this has so many reviews.
Cons: Everything about this sucks balls. This is a cheap device, I don't normally leave reviews but after paying such a high price for some lightweight plastic; I have to inform all of you. The build quality is cheap plastic , flimsy garbage! It feels terrible. I own many logitech products (g700, track...
Excerpt: This is the replacement for the cordless optical trackball. They reduced the total number of buttons and for some odd reason, changed the ball position from the top, controlled by index/middle fingers, to the thumb.
Summary: This is the 3rd M570 that has gone bad. Logitech replaced the previous bad Trackballs and now this one is bad again. They promised a return label and another replacement but nothing showed up. They no longer acknowledge my calls or emails. I have given up on them as a company.
Pros: Good for 3 months at a time
Cons: Random double-clicking, loss of tracking capability, track ball freezes because of sub-quality glides
Summary: I've still got one of the original Logitech 3 button mice - the big, wide clunky ones. It still works. I wish this trackball still did, it was great while it lasted.
Pros: Super convenient for using laptop with a lap desk or on a couch.
Cons: It worked great for several months, but the buttons fail. If you check the Logitech support forums you'll find quite a few people like me who have encountered failing button switches. It randomly registers double clicks even when you only single click, and while dragging, it randomly stops draggi...