Summary: I setup the +/- buttons to switch between applications and I recommend you do the same. In the utility included on CD, set up keyboard bindings for the two buttons. Set the + to "Alt+Escape" and the - to "Shift+Alt+Escape".
Pros: The buttons are well thought-out, with those unique +/- buttons behind the scroll wheel that are very useful. The LEDs on the mouse are also well done; the mouse itself indicates its battery level and the current sensitivity level. And it has two batteries so you'll always have one charged so you...
Cons: A bit heavy, as all wireless mice are. Also it's right-handed only, which would upset some people.
Pros: Awesome everything.. battery life is as advertised for me despite what others have said.. I've logged about 200 hours now on it and I'd say I get 8-10 hours of continuous play before I hot swap.. All in all very pleased and surprised with the quality of this mouse
Cons: Only con I would say is that the mouse dpi resolution up down buttions are awkward for accessing during gaming so I never really mess with them even tho that's one of the key advertised features..
Summary: Hmm, well it's a very nice mouse, and it definitely keeps my love for Logitech products high. I still own and operate my last 5 Logitech mice.
Pros: Although I bought this just over a week ago, this has been a very satisfiable purchase. Accurate tracking, sensitivity is great if you are a design artist and/or programmer. Great for gaming and the sensitivity buttons under wheel are very helpful.
Cons: Under heavy use, battery will last for about 2 1/2 days (on 8 hours of heavy use per day or approx. 20 hours). An additional thumb side or pinky side button would be useful.