My problem's with the arches. I have size 11.5 arches on size 10.5 feet. I've never had any problems with me, and various doctors have told me that fallen arches or nonsense like that will never be an issue for me.

Good for rock climbing because it makes my feet more rigid.

The other thing is I hate my feet being cold. Going with the larger shoes helps keep my feet warmer.

I bought my last pair of shoes in the same manner. They are still in good shape, but are my "proper" size so my feet get cold, particularly when I'm wearing warm socks.

I'd looked at some of the higher end shoes. Don't need all that stiffness (I said stiff...) and I didn't want to spend all that much money.