Logitech Wireless Marathon Mouse M705

Pros: +Good ergonomics. Designed for the right hand.
+Excellent battery life
+Scroll wheel has locked and unlocked mode for fast or precise scrolling
+Wireless and able to connect via Logitech's unifying receiver which supports up to 6 wireless devices in a sin

Cons: -Scroll wheel is too stiff to use middle click accurately. When I go to middle click a link in my browser to open a new tab, the wheel will jerk between lines.
-Forward and back buttons do not work as expected out of the box (that is, move back and forwar

Summary: The battery life is solid and the extra buttons are nice to have, but it fails in basic needs of precision and a usable scroll wheel click.