Sam Dudleywrote a review of Mad Rock Shark Climbing Shoe on April 7, 2014
Familiarity: I've used it once or twice and have initial impressions
Fit: Runs small
There was a Mad Rock rep who came into the bouldering gym I work at (The Mine Bouldering Gym in Park City, UT) and had a whole bag full of these funky shoes.
They look really cool and I was excited to try them on, but for the life of me I just couldn't find a pair that fit me right. They were all way too snug around the heel, to the point to where I couldn't really step down into them all the way. And I definitely don't have a wide fit by any means.
Anyway, I'm sure they're awesome shoes if they fit you, but they seem to be pretty limited in what kind of foot they can accommodate. SO, like I said, try em before you buy em and make sure.