As a related question to bdcheung's earlier post, does anyone have experience with the Sidi full carbon-soled shoes, such as the Genius 5.5? I've heard (perhaps incorrectly) that they're considerably stiffer than Sidi's earlier models. If so, is the extra stiffness worth the extra cash? Are they substantially less comfortable to walk in off the bike?

I have Sidis now, and like the fit very much, but they're getting a little bit long in the tooth, and I'm in the market for another pair. 'Preciate any thoughts people have...