I've heard directly from some cat sailors that have tried them and they say that they're extremely unstable until you get it airborne on the foils - at that point, they're solid as a rock (which makes sense since the foils have so much more beam than the boat itself). They didn't feel like it was a real good choice if lakes are you primary sailing arena.

I heard prices in the upper teens to low 20's...basically new a-cat territory.