Agreed, it's great software. The adware component, however, is evil. My hard drive was running full blast at random times when I wasn't using the computer. I tracked it down to a program called "CD_Load.exe", which turns out to be the from the CyDoor adware package, using by MP3 Tag Studio.

There's lots of information about CyDoor here:
http://www.cexx.org/cydoor.htm.

Luckily, you can remove the original CyDoor DLLs and replace them with some dummy files that pretend to be the adware.
http://www.cexx.org/dummies.htm

I didn't mind the advertisements, but I did mind my hard drive grinding away in the middle of the night from their buggy adware.