The bag is absolutely reliable and you, as long as no grains of sand get into the closure.
In addition, one should not be alarmed if the water up to the "rolling shutter" arrives, this happens already at shallow depths, but it does not occur to the interior of the bag (self-test passed up to 20m)
Handling the camera in the bag is really very chaotic. I can imagine that people with slightly higher comfort requirements can it easy to despair. It looks bad on the LCD screen, all buttons on the top are very difficult to access, it is just enough to trigger press, rotate with Zoom lever or Modusschlatrad takes some practice.
The picture quality is exceptionally good, have already photographed with other underwater cameras and found no significant differences in shallower depths. In greater depths, however, a problem may come back in the bag that the built-in flash does not ausläuchtet the entire image because of massive plastic edge of the lens part covers somehow you manage to exercise but then anyway.
Conclusion: For people without high demands for comfort underwater Highly Recommended!