Great idea, there are lots of apps on the iPhone for cycling and mountain biking, so there is an obvious space in the market for a device to mount the iPhone to your bicycle. The case itself is well-designed, having a rubber insert to cushion the iPhone, and the material for the clear screen works okay. The problem for me was in the design of the bracket that mounted the carrier to the handlebars, the nylon threaded strap that secured the mounting bracket to the handlebars simply wasn't strong enough against the threads of the Alan bolt you tightened, so even when I tightened it as much as possible, the nylon threads gave away and the mounting bracket was loose on the handlebars. It came supplied with a rubber mounting strap that this did not solve the problem. In my opinion this product requires a little more R&D.