Honestly, this is the only 3rd party streaming app that I've ever used, so it's possible there are others which are superior, but in general, this does what it ought to, and seems to do it pretty well. Netflix plays smoother, and looks better than it does when I stream using a browser application. The only real suggestion I woul have is the option to have a detached transport control (etc.). Would be great to be able to see the artist/track, like/dislike the track, etc. without having to toggle apps, or have the player taking up valuable screen real estate when I'm on a single display. Would be fantastic if it could be in the menu bar, but given that not even iTunes does that, that's probably a bit much to ask.
In general I'm stoked on this app so far, will probably remain my main OSX media streamer for the foreseeable future.