Summary: It was buggy from the start and then it broke. Bad quality, don't buy.
Pros: Was fine while it lasted.
Cons: My pc would have trouble recognizing the device occasionally. The battery meter would flicker "low battery" warning from the start, even when this was not the case with prepackaged battery that was new. Finally it just stopped working. Tried brand new Duracell batteries to no avail as well.
Summary: This was the cheapest mouse I could find in the brick-&-mortar store. They wanted to charge another $10 for a full size, which probably cost the manufacturer another 2 cents. Good reviews on Newegg. Maybe I'll keep using it and maybe my hand won't spasm.
Pros: Kept scrolling 40 feet from the receiver, without walls. I would have tried it with intervening walls, but then I wouldn't have been able to see whether the monitor was still scrolling (or not). Windows installed drivers in a minute; I didn't install any other software.
Cons: This mouse is so small, I think my hand is going to start spasming if I keep using it for too many more days. I had to readjust all my mouse settings when I got rid of the wired mouse.
Pros: Small, fits in my pocket easily and even my tiny hand. It's a quiet click and no laser for noobs to shine in people's eyes. This mouse has the smoothest scrolling I've ever seen. After I downloaded and installed the SetPoint and ScrollApp from the Logitech web site, I have the icon in the taskbar...
Summary: Is identical to my old Logitech mouse, which was what I wanted...except the name on it is Logicool? Not sure what that's all about, but it works wonderfully, is excellent for gaming and portable. Delivery was slow but I am pleased with the product.
Summary: Easy to operate/connect - smart little mouse. Only negative is the small USB Bluetooth connector which could get lost because of size or knocked when a laptop is being put away. Not sure that it could be designed any other way though