Review on Sinjimoru Cell Phone Card Holder Wallet Case for Back of Phone with Secure Silicone Phone Stand - Midnight Blue with Zip 2 Card Access by Marc Oner

I currently have two credit cards, my drivers license and a paper health card which is a little thinner than most standard business cards. They fit in perfectly. I attached a metal disc to the door for use with a magnetic phone mount. It doesn't affect the number of cards it can hold as I placed it over the rubber clip that holds the cards. The latch on the door is very secure, and even if it's only held in place by a magnet, I'm not worried about accidentally opening it. The only downside I have is that the rubber clip isn't as strong as it was the first time. It still does its job but not as reliably as the day I received it. The glue is very strong. I haven't removed it and tried to reattach it, so I can't say if this will be the case in future uses. Edit: after uninstalling and reconnecting to different phones (I had a lot of problems with the phone) I can say that this works relatively well. DO NOT attempt to attach the phone to any fabric. For me it destroyed the stickiness. The hair just won't shed enough to make it effective for sustained use. Still, the overall usefulness and quality is enough to warrant buying a new one. I still give it 5 stars for that.