I myself own a pair of
Birkenstock shoes, and can attest to how wickedly comfortable they are. I wore them for a full 18 hours at Disney World last year and my feet still felt great. Now this year we're doing Disney sans stroller, so my little guy is going to do a lot of walking. I got these
shoes for him and he says they feel wonderful. I'm confident they will pass the Disney World test. They run large, though. My son wears a size 12 shoe and I got the 29 for him, and there is still growing room.