Although the site is slightly confusing in terms of downloading and using the software, once you get the idea of what you have to do, the site is great for finding mp3s.
I have never had any trouble finding anything that Ive looked for and best of all its FAST! I think its much better then Napster ever was.
The down side of the software is that it attempts to install some additional things which I dont want (such as Gator) but if you pay attention when installing rather then just hitting Yes all the time like I do, you can choose not to install the unwanted software :-).
Also it can use a lot of bandwidth if you have it running in the taskbar all the time as people will be downloading from you a lot. If youre on a slower connection its best to choose not to have it in your start up menu.