Dustin H.wrote a review of Shimano SH-XC90 Shoes - Men's on April 4, 2017
Familiarity: I've used it several times
I've used these shoes for about a month now. Man, I am in love. I have slightly wide feet at the toes, and a fairly high arch. These fit like a glove--and surprisingly I did not need the "high arch" custom insert (the medium does fine).
I've never had mountain biking shoes this light and stiff, and they are phenomenal for pedaling. The first week I had them I wore them for a 6 hour day and a 4 hour day back to back while on vacation in Pisgah. My feet stayed comfortable the whole day...except when hike-a-biking. That stiffness is no fun when you're pushing your bike up a steep, rocky, rooty trail. But I don't have to do that very often, and the comfort these provide for long periods of pedaling more than makes up for that.
One thing: the blue ones are BLUE. Like, bright metallic blue. I hadn't seen a pair in person before buying them, so they took me a bit by surprise. I think if I were going to do it again I might have gone for the black ones. But the GF says I need to step out of my comfort zone with my colors, so maybe this was good for me.
I see some of the reviews have negative comments about durability. Obviously I can't speak to that, other than to say I hope I don't encounter the same problems, because I love these shoes and hope they last.