I bought a new one of those a few months ago (in cork). $205 new before the BikeSnob 10% discount.. I am still trying to decide whether I like it. I went for the "open" one because I have a slight leg asymmetry and I thought it might help. I am not sure that it does.

I replaced my B-17 with this, and probably because it is narrower, I can run it a little bit higher, and it seems to give me a very small performance boost, (although that might be a product of expectation bias).