I have never lost my wallet but been known to misplace them for up to two years at a time.  That's why I have two, one in my pocket and one as a backup.  The really hold about 5 cards at the most (it all depends on the thickness of your card, example, driver license is thinner than debit card).  It is not enough to hold all your cards but if you are looking to go out and want to keep it simple, driver license, credit card, member card, and a handful of benjamin franklins without BULGING your pockets, this is the way to go.