I have SPD's but only becuase that is what was passed down to my by my hubby. When I bought cycling sandals I just found a pair that fit the pedals I had, but I've been looking at some carbon road shoes and it looks like most of them don't fit SPDs but I can't find why?

Is SPD better for mtb shoes or is it fine for road bike shoes too? And on the same note, is their a brand/style of road shoe that everyone loves?

I'll be riding the MS150 next spring and I don't expect to need to do any walking in my shoes, but I can see an advantage to being able to if necessary.