Zipp 303's

I am about to review these on BT and on the net myself but before I do I wanted to see if any of yous guys in my extended BT family had any first hand opinions on these. I picked up a set today from CL, 303 tubulars w/ about 800 miles on them for a great deal. Was planning on buying wheels in the fall but just couldnt pass these up. My new ride has not shipped yet so it may be a while before I can try them out for myself. thanks!