One of our users has posted some experiences in their comments here:
http://plugable.com/2010/09/29/displ...ta-1-6-beta-3/
In short, things appeared to be better behavior at first, but they're still finding some significant things going wrong with sleep/wake on their system.
They're using Apple DVI-> ADC converters for connecting both DVI and USB to older ADC Cinema Displays, so theirs is a challenging setup.