Why would you use it for ? It simply sucks, because there're better rippers than SS and codecs than ATRAC. It's the only reason why I'm not buying a Sony NW-MS70D. And it screwed up my Windows system (because it installs older versions of Macromedia and CDDB, etc. without asking) and I had to reinstall bunch of stuff. If you're not forced to use it (i.e. a Sony owner), then don't.
Check
this and
this.