IMO they're overpriced slightly, very very nice, but they have their flaws. on the surface their clamping system is very good, BUT we've had problems with them blowing (this is on 172 cup racer) at the joints. and also it looks like they ran out of argon gas on some of the welds, maybe we've just got a "bad one"
surprisingly the race system for the 172 isn't that expensive