I don't know anyone who's using it right now. I still use good old Dropbox to keep all my work safe (as it keeps not only music projects but all other files and my sample library that i can access from iOS apps or any other device).
But... it is part of Roli company now. And I love everything Roli makes. And all the companies they acquired start doing great things So I believe it is pretty good and should do the job.