I've been reading the reviews of people complaining about sharp edges and it destroying credit cards.  I suppose all of that COULD happen, but if a person has common sense none of these should matter.  If you put enough cards in the one side with the edges, it will never affect you.  If you put a card that CAN be rubbed against the metal side (license, gift cards, business cards) between the metal and your credit cards, it will never damage your credit cards.

Also, sombody complained that it made too much noise, scratched their phone, etc.  Again, common sense should be used.  Carry your phone in one pocket, and your Slim Clip and keys in the other.  Your keys are going to make noise anyways unless you only have rubber keys for your plastic car.

This is a fantastic little organizer that allows you to NOT carry a wallet which is very uncomfortable to sit on and is too intrusive for your front pockets.  If you hate wallets and have a shred of common sense, the Slip Clip is awesome and I would highly recommend it.