QUOTE(noobie1 @ Sep 9 2009, 09:40 AM)
the two xtra key on the top left key there make me feel uncomfortable...=(
Those 2 buttons are the DPI switchers, up and down, from 5 user-selected DPI values. There's also a DPI switch display on the mouse.
Used as DPI switchers, the placement for these two buttons are great, miles better than the ones on the Copperhead, Lachesis, Ikari Optical, MS SideWinders, et al. I've never switched DPIs on a regular basis with all my other gaming mice, but I do with the Mamba.
And if you don't intend to switch DPIs, those buttons are far off to the corner enough so you'll never accidentally press them.