If that was supposed to be a 1-5 star vote, then your questions don't read like that. I voted that there are some bugs, but nothing extremely serious but if I were pressed for a numerical score, I'd give it a 3.5 out of 5. Overall I like the service a lot. The recommendations work well for me, I love that I can integrate everything into my existing collection and no longer have to manage libraries through two services. The bugs I have run into are mostly to do with adding stuff to my library doesn't always sync across devices immediately, and then I've had it duplicate the same album once it does, not downloading an album when I tell it to, and some weird behavior when connected to my car's head unit. Otherwise, there are some poor UI implementations, but as I've learned my way around I'm getting pretty used to it. It's not like Spotify isn't without its own (numerous) UI quirks.