This is a wonderful case and I'm concerned that some of the reviews will turn people off from it.
The rubber is a thick, high quality material that grips the phone solidly. I can fit four cards in, plus an emergency bill. I heated and peeled apart my RFID access card from work and, after trimming it down, have it sticking to the inside of the case behind the phone, a move that did not affect the thickness at all. Now, everything I need is in one unit, which is very nice.
The case pushes the cards up so that they will not slide out, even if you have only one card in the wallet slot. Thankfully, this case does not block any of the ports and does not crowd the flash, an issue that causes problems with photo quality in other cases. I like the matte finish, which does not attract fingerprints.
I do wish that it fit in car docks better - I originally bought the Encased dock (iPhone 6 & 6 Plus, Charging Car Mount Navigation Dock By Encased® [Windshield / Dashboard Compatible] **Apple Approved MFI Certified Charger** (Case-Free Design)
) but found that the charging prong was too far back on the dock - the fatness that the wallet portion adds makes it impossible to use this dock with the case on. I have now ordered another dock (iBolt iPro2 MFI Approved Car / Desk Dock / Mount / Charger / for iPhone 5 / 5c / 5s / 6 / 6+ with integrated Lightning Cable - Retail Packaging - Black) that looks more flexible. If you are interested in my results, just ask in a comment.
I give this case 5/5, as the car dock issue is to be expected with the extra thickness of cards. Other than that, this case has been wonderful to use and I'm glad I purchased it!!