The packing of the camera, the closing of watertight closure and the handling by the thick plastic are a bit annoying, but for a - compared to more professional systems - so cheap solution I think that's acceptable. In several experiments, the bag has proven to be waterproof. The handling is somewhat limited: My camera does not fit particularly well into it and slipped on the road - sometimes to the point where the objective is no longer behind the special window. The operation is fairly limited by the thick plastic and requires some practice under water. Smaller switches are very difficult to use, but even the shutter is difficult to feel and operate.
