As posted, I uploaded a fair amount of audio of all sorts last night and I've had the Cloud playing it back for the last little while. It does just exactly what it promises, very user friendly and the playback quality is just fine, considering the source media is MP3, for my usual eclectic playlist: Barry White, Neil Diamond, Spinners, Statler Bros., George Jones, Barbara Mandrell, and Cat Mother & The All-Night Newsboys.
Toss in some 1960's and 1970's airchecks and a few episodes of the NBC radio spooky series X Minus One and you've got an interesting few hours.
Why, it's like having a time-traveling AM radio in my computer! Except for that whole (A+B)(A-B) stereo thing.
I heartily recommend this free deal. I just wish they had an iPad app for it...