VH, not jewel cases but wallets.
if you always zip them up and make sure no debris gets into the case, you shouldn't have a problem with creating scratches when you slide the discs in and out. if you want to be absolutely sure, i'd choose another storage method that doesn't involved sliding a disc at all (i.e. jewel cases).
as far as any problems, i haven't really observed any (and frankly don't give too much of a hoot). im terrible at properly "caring" for my discs, they just don't mean that much to me and out of the thousands (like 3000) of discs i have (both pressed and burned) i haven't had much trouble reading back any of them.