Music Beta by Google service has been started

I received the invitation email for Music Beta by Google today, when I clicked "Get Started", the sign up page was opened and passed couple of pages to the end.
The attached picture is the Home image, you can listen to so many different types of music, and also able to upload music on your library. The big difference from other app is that user is able to access and enjoy listening to music even offline area...how is it possible!!

You need to download music manager to add music, it seems like "MusicManager.exe" isn't working properly so far. I am trying to download it again and install and rebooting OS,, but so far no luck..hm.

I am excited to see how popular the app will be, once they released the official version.
This app would be one of the representative app of cloud computing service. :)