Originally wanted a GoPro but have then but bought because of the price, the Sony HDR-AS15. The comparison videos on Youtube (GoPro vs Sony AS15) had convinced me. With the Android app "Sony PlayMemories" even the image via Live View can be displayed on the smartphone. So that addition can be made the main settings of the action.
Convincing is the 120 ° mode for which an image stabilizer can be turned on. The image stabilization works very well. For me the ideal Action Cam.