This product works very well with a direct connection to the camera and also as a compact flash reader. You will probably get a message saying "Device not supported" after it has been connected, but it doesn't seem to affect the performance at all.
I bought one of these when the iPhone 5 came out. It seemed perfect for my needs at the time. It broke within a few months. The top plastic corners are very much a weak point in the design. They started cracking almost immediately, and broke off on the left side shortly afterwards. Another problem is the lack of catch to hold the flip-front closed. I imagine that the back of the phone is the only thing that is actually protected!