We are very happy with our Hero 9 and Ski Doc set up. The image quality and stabilization is superb and more than adequate for video analysis of technique. But you won’t get highlight reel “footage”. The max digital zoom available is just 2x, and digital zoom by nature results in a loss of resolution. Plus, owing to the physical time lag of the camera rotation on the Ski Doc, 2x is limited to lower level skiers who don’t pull too wide and ski out of frame. 1.4x (max digital zoom for higher resolutions) is pretty good for shorter line lengths and better skiers who get higher on the boat, but at 1.4x you don’t have a very tight image. Again, it’s very useful for instruction, which is the main point for us. You can of course zoom in further during replay, but since that is also a digital enlargement you will lose additional resolution. The package is convenient, compact and easy to use, plus the camera is water proof to some shallow depth I can’t recall at the moment, but it’s certainly not vulnerable to getting incidental water damage in the boat. It’s an invaluable, unmanned, hands-free learning tool, especially if you don’t have a knowledgeable observer in the boat who could shoot with a hand held DSLR and a longer optical zoom lens for the absolute best results.