Im currently looking to replace my shoes(3 bolt).The easiest thing to do is simply to replace like with like,my present pair are Mavic and indeed Ive been very pleased with them all round.I simply liked the look of the Fizik and having tried one of their(very expensive)shoes found that the fit was a good one.Fine so far, however one hears and reads of issues with Fizik shoes in terms of construction,overall comfort and the like.So,if you have any experience of Fiziks and 5B in particular,Id be grateful for your thoughts.