I've been using a MC mix and a MC transport no problems for some time now, I've just bought a MC control to compliment them and cannot get it to work without freezing every few minutes requiring a hard reboot by pulling the mains cable.
I'm running :
Gigabyte EX58-UD5; 970, 12 gigs ram, SSD revodrive with windows 7 x64 sp1,
netgear gigabit switch 8 port
cubase 6 and pro tools 9
latest software and firmware.
I'm not impressed!!
MC