I would like to be able to say more

I have tried different cameras. In my test, I have confined myself largely on the image quality, the sound quality did not affect me as I go diving (no important sound) and sports such as skiing, wakeboarding or cycling (only wind noise) would like to take action.
For testing, I have the cameras in our aquarium (about 30cm deep, well lit and reasonably clean) sunk, on the handlebars of my bicycle tried on the road and in the woods and used poor lighting conditions in our cellar.

Now the picture quality:
Underwater, the camera is beautiful, clear images.
According to my tests on the road and in the woods, I was very disappointed to operate the camera and the feedback is so bad that I did not notice that the camera has nothing recorded. This unreliability is impossible!
At the beginning of the tour, I have checked with the app if I'm in the photo or in video mode, because the cam is not signaled and I was not sure which switch position I had to choose. That was a mistake. I was in photo mode ... So there are 4 photos were taken of which is purple. Candid and set off ...
Was very surprised upon arrival that the memory card is empty. Another tour was unfortunately the Waser, the camera had failed.
After some trial and error I found that the camera probably always completely crashes after the Bluetooth connection has been established with the app.
So I can so unfortunately the picture quality in this case, nothing to say ...
The photographs in the house are fine, but noisy clearly visible in low light.

Conclusion:
Operation EVIL !!! vllt I had bad luck
Image quality okay.
So unreliable completely unsuitable as Aktioncam!

PS: I tested the Rollei Action Cam 5s diving, the Fantec BeastVision, the GoPro HD Hero3 Black, the JVC GC-Addixxion XA2, the Contour + 2, the Sony HDR-AS15 and Actionpro X7. I could not decide the cameras, the Fantec however BeastVision by extensive accessories and acceptable video quality my personal price / value for money. Sony has the best image stabilization.
I'm still waiting for the end of September 30 and the Rollei S-50 which appear in mid-October on the Sony HDR-AS.