Razer Lachesis

The Razer Lachesis failed on many counts.

Its buttons are still annoying to reach.
Buttons 4/5 are both on the thumb side.
Buttons 6/7 on the right do not work under Linux.
The sensitivity is so outrageous I'd have to tone it down a lot, and even then it would reset every suspend/wakeup or reboot. Even with fiddling with its settings and my system's mouse settings it never felt right.
It has a fucking night light built in. Although this can be disabled, one has to install Windows to do so.

spiralofhope