I am size 10 in adidas, Nike, Foot Joy, and every other shoes that I can think of. This was a snug fit for me in a 10 with regular athletic socks which I what I like when they are new because often shoes stretch a little bit.

lateral stability: 10 out of 10
heal cushion: 10 out of 10
arch support 10 out of 10 (for a training shoe running shoes have more by design)

I use these for doing Beachbody workouts like P90X and Insanity. Insanity is really the reason I purchase cross-trainers though. The biggest difference between running shoes and cross-trainers is that cross-trainers are designed for lateral movement. Doing plyometric exercise in running shoes will allow your foot to slip right or left just a little bit then when your foot eventually catches the side of your shoes it strains your knee causing inflammation. I learned that the hard way and it took  time, rest and ice to get better.

I have never found a training shoe that I have purchased twice. Either because I have not liked them enough or the company stops making them. So far I like these enough to purchase them again hopefully Asics continues to make them. I they are still here in 6 months I change the review to five stars.