I just want to hop in here to say that I own two mice with the same sensor as the Avior 7000 (Naos 7000 and Corsair M45) and neither track on the MM400, at all. Cursor doesn't even move. I use a QcK for my 3310 mice.
I did pick up a Logitech G502 today (and I LOVE IT) and it'll track great on the MM400 after calibration.
 I'm starting to think there's a difference between metal's MM400 and my MM400, lol. It's a great pad regardless.
Edited by Malvolg - 4/14/14 at 9:06pm