one of my earliest fetish experiences was with one of these on a high school white water rafting trip. just not me wearing it but seeing them on my classmates too.
the look and feel is very close to real latex - or as real as you can get too when balloons are the only other thing you've had time to play with.
another aspect i loved is the way they almost could stand up by themselves as they are so thick. almost like a latex shell; a rubber skin of a life sized doll. oh.... and they can really compress you and kinda snap you into the shape of the suit unless you exert your own force against its pre-made shape. very bondage lite in the same way as corseting is bondage lite.
being so slow and involved to get into one also means your going to stay in it for awhile now won't it?