It works well, but I prefer the internal features, Youtube's Watch Later (and private playlists), and Vimeo's Watch Later. I think it will work better when there's more overlap between the sites it supports, or maybe it just doesn't support my habits. I'd love to come back in a month and look.<p>I'd be interested in an iphone app that plays the hd audio of youtube playlists, is this related enough to be a feature?