I got my mouse today from Massdrop.
M1 takes slightly high pressure than M2 but its not a problem for me.
Cable was annoying so I changed it to DA 3g one.
Sensor is the best feature, it has completely raw feeling in game. I wish there was prediction on and off function but it doesn't bother me that much.
Scroll wheel should have slightly more define clicks but its personal preference.
I kind rest my thumb on Mouse4 which I will get used to it.
I must give props for 1st...