I had a set of them as track wheels in '03. I liked them a lot - light, strong, and not bad looking. If you're making a straight up trade of the Slipstreams for those, you're making out like a bandit.
BTW, shuhart1 decided to do a little stress testing on the set I owned - they stood up to an MSR mishap pretty darn good.
I ended up selling them to a friend of mine when I went back to racing in C Stock.