A short exhibition deserves a short review I find.
This exhibition is good in that very Design Museum way. IE go if you're in the area and don't expect to be there very long.
I'm not really a big Hussein Chalayan fan and I was pleased to note that you don't have to be to enjoy the exhibition. It's interestingly put together and it moves along at a decent pace. It's unusual but not wanky.
When I was there it was besieged by fashion students who making the most of the Design Museums wonderful Yes You Can Take Pictures We Are All Grown Ups approach to copyright.
You should go, if you're in the area. Just don't expect to be there very long. More pictures on Flickr.