I just got my first pair of Allen Edmonds (Park Avenue). Most of the crappy dress shoes I've worn in the past have been a 12, which is generally my sneaker size. I noticed just a touch of heel slippage with the AE's. I bought a pair of heel liners tonight and there's really no slippage now. So in the future, would I be best to go down half a size with AE shoes, or does it sound like sound like I should stick with a 12 and pair it with a heel liner of sorts? The liners I bought aren't terribly thick, which made me think going down even a half size may prove to be too snug. The only way to know for sure is to try on a pair of AEs that is a half size smaller, but it's not uncommon to wear a smaller size in dress shoes than sneakers.