Not bad, but if you want a really thin wallet...

This is not a bad leather wallet, but if you read the New York Times review, you'll see they actually preferred another wallet -- the "ALL-ETT Billfold" -- over the Slimmy. The "all-ett" is made of a much thinner material and places your cards side-by-side so it can hold a lot more than a Slimmy. It's cheaper too!