This add-on generally works very well for saving videos for watching offline. Once in a while the download goes so slowly that it never completes, but I'm not sure if that's a problem with the add-on or with the server the video is being sent from. It won't compensate for a slow server, in other words. The interface could also be a little more intuitive at times, especially when multiple resolutions of a video are available. It's hard to retry a resolution when it's failed; selected options disappear from the list, and the list doesn't seem to refresh. But when it works, which is nearly all the time, it works very well. It seamlessly downloads in the background and then provides a clear notification when the file is ready.