Well in the crucial points.

As I said it is just as well where it is also entscheident. That it's just the camera into the envelope into it and get back out.
But if the camera is left in the envelope because you're too lazy to bring it back out, and then packed in the backpack, she gets tiny but many Wafer-thin scratch on the display peephole, which has the consequence that the actual image on the screen clouded coming over.
Another minus is that it's really hard, the camera on and off (in the case) because the button is really hard Bockel. When pressing several times you get marks on your finger.
Then the envelope with the camera is in the water under and that pretty quickly. I do not know if that's good because they can not expel or not because you have to or looking after diving.
Then the envelope is not as flashy underwater (stupid for me because they have to look often) even if you are in the pool.
But it is also very waterproof (still good to know xD), have them in the water had mal ne whole week because I had forgotten it. Nothing happens.
The Platik / glass where the lens "sees through" get in the backpack and otherwise no scratches.

And despite all these small (for me) shortcomings there four stars for the successful underwater housing.

PS: During the holidays, I am immersed (why I bought the shell) and there was the camera (not me but my teacher with the action) came in 10,3m under water and nothing is. All the better.