Hmm, I guess they are a BAD design because even a low-flow toilet should, well, flush. It's not saving any water if you have to flush it several times!I seriously considered this, but where we are staying they have super low flow toilets. I guess they are a swanky design but it takes several flushes to get a normal, not stuck to undies poop to flush.
Ours are low flow, and I rarely have to double flush. In fact, we don't even flush every time.