The camera is small, light and robust, which is certainly likely to be the main criteria if you want to buy an Action Cam. A design award but is not Rollei win it. The processing is practical and at a high level.
The recording quality of the camera, I do not think so euphorisch- clear in low light noise, the dynamic range is limited and leads to ausreißenden lights in relatively many situations. There are occasional compression artifacts and the sharpness is partially not great- with images in motion and falls toward the edge somewhat. In addition, the videos show a barrel distortion, as is typical of wide-angle shots. Only: we are talking about an Action Cam, a tiny and featherweight device, which serves as not to interfere and to take useful images.
Came the images of a large SLR or a "real" camcorder, I would find it not good. For Actioncam but the little Rollei makes a really good job.
The service I found easily and use with a mobile phone allows halfway useful maturities when the display decreases to the action. Nevertheless, a second battery is recommended and a fast, large memory card also makes sense. The battery you get directly from Rollei.
I think the camera well. If you like this wants to have a lot of accessories and intends thereby to film under water, makes a good buy here.