Pros: Simple, elegant. Hyper-fast scrolling is AWESOME, a must-have. I don't know why more people haven't caught on, maybe it's because I spend most of my time in long pages of code. V550 silver looks beautiful alongside my MacBook. I've never had a trackin
Cons: Has relatively few features. Just the basics. For some people this may be a drawback. (I prefer it this way) It comes with an adhesive hook thing that allows you to hang the mouse on something (like a monitor) when you're not using it, but I didn't wa
Pros: Vertical wheel with wheel that tilts for horizontal scrolling, wheel also can be freewheel scroll or have detents that keep the wheel from scrolling freely) App button (similar to expose' on mac) allows you to see all the open windows on your XP desktop
Pros: 18 month battery life, stylish design, precision laser tracking, nano receiver, USB extension dock and dock clip are included, and the super smooth scroll wheel.
Cons: Scroll wheel loses its third button function, but you can program the button below it to act as a third button, something new to get used to. No darkfield technology like the Logitech Anywhere MX which can be used on glass.
Pros: Wheel scrolls very smoothly, and has enough inertia and low friction that you can spin/scroll the whee completely through a long file with a flick of the finger. Lively and accurate response; simple, beautiful, minimalist design. L/R scrolling!
Cons: No cons really for me. Could use a couple of extra buttons, I guess, for gaming or whatnot--but they would mar the elegance of this fine little device. I think it looks REALISTICALLY futuristic (as compared to cinematically futuristic).
Summary: For my mice needs, I've been using Bluetooth mice. The computer I bought the V550G for doesn't have Bluetooth and I didn't want a cord or a big optical dongle hanging out of my Acer Aspire One laptop. The V550G has a small USB interface that only hangs out a little more than 1/4" if that. The mouse worked immediately when the USB interface was plugged in. I've had a lot of trouble configuring Bluetooth mice and absolutely no trouble with the V550G.
Pros: Accurate Tracking, Comfortable Design, Fast Response, Glides Smoothly, Great Features, Works On Any Surface