4x the price to start off with, 51x51x15mm size, Only 11 days battery life if you use the always on display according to their site, completely locked down OS and ecosystem that puts you at 100% their mercy when it comes to EOL and updates, no idea what their privacy policy is, but you probably have to accept it if you want to use it and just put up with the fact that all your data, location, heart rate, and everything else is sent and stored and most likely used for training different AI models, and probably getting sold to different companies.