Isn't there a statistic that 89% of statistics are made up on the spot? Or is it 87%? Either way, I'm pretty sure there is some statistic or at the very least a common saying that says "x percent of statistics are made up on the spot".
If I were just using this for music, it may be worth trying, but if I would decided to store other files, I don't see what makes it better than any other cloud solution. There is no desktop app for exploring the directories and you can only upload files, not whole folders. I would have to set up a folder hierarchy instead of just uploading whole folders that are already arranged how I like them. Besides that, I would personally rather point a music player at some folder that's linked to cloud storage (like Dropbox) than use a web-based player.