The Demons are one of my favorite climbing shoes--they top my list for aggressive shoes.
These are tough to pull on my feet, but once on they are the snuggest fit--the Demons fit my feet perfectly (I have a medium to narrow foot with very narrow heels). The toe is sharp, letting me get an edge on the smallest foot jibs, while the body of the shoe is aggressive, letting me project the steepest roof climbs I've been on.
These are a great pair to own, especially if working on steep climbs. I wouldn't recommend them for slab or even nearly vertical walls. Otherwise, I love the Demon 2.0!!