Here's my review of it: It's a decent service. It's easy to use, works in Firefox. However, the selections are rather low (and they stock information on bands they don't have songs from) for us non-contemporary listeners (I.E. those interested in Gregorian chants and Christian metalcore [granted, that's almost nobody]). I'd be willing to recommend them to anyone, given that it works. Not all of the songs tend to work. Some do, some don't. It's not that they can't be listened to, they're just messed up. All in all? Four @'s.
What do you think?