I've ridden in Sidis all my cycling life almost. I love my Mountain bike shoes. Loved my road shoes. A couple of years ago I was sponsored and got a rip roaring deal on Specialized road shoe. It is okay and I still wear it cause I'm frugal, but it is not as stiff, nice and as well fitting as my old sidis.

I have a fairly slim foot, long toes and a very slim heel so maybe that is the type of foot Sidis fit?

My husband has the narrow version of a Sidi and he really likes those.