We tested the Apex HD + WiFi in beautiful sunny conditions as well as in a blizzard and the image quality was awesome. Still images were crisp and video too was nice and smooth, especially at 720p and 60FPS. One issue that plagued us while skiing during a blizzard that we didn't notice until we got back to the cabin to go over the day's activities was that the falling snow covered the lens!
Since we setup the camera angle before the snow started falling it didn't occur to us to clean the lens during the day. Lesson learned.