I've only used the application briefly, but it seems to work well for what I've used it for. One comment: the app seems to be locked in portrait mode. It would be nice to let if work in landscape mode for smart TV and Android TV boxes so the full screen is used for showing a camera. Maybe also a tiled display like the Yi PC application shows. All in all, it looks like a good application for Yi cameras. Update: the latest version freezes and will not let me enter a pin on pin protected camera