This is a wonderful thing. It makes even my croaky, off tune voice sound good. Lots of fun. I did have some problems loading the app into Windows 7 from the device, so I went to the Paper Jamz website and downloaded from there with no problems. After that, putting new songs into it from my music Library was just a matter of drag and drop. Very easy. I didn't try loading anything from my iTunes library, so I don't know if that would be a problem.
Software and hardward ie very sophisticated for the price.
No, it's not a professional sound system and has some feedback and distortion problems but for under $20 it's a bargain.