Enjoyable.
It was a really decent attempt at an easier way to browse the Newgrounds Audio Portal. I like how you made it into a media player of it's own, with things like the "Artist Profile" and stuff.
However, there are some things I would have improved on, such as filters for genre, and length, especially with the amount of drum loops people upload.
Overall, a great alternative to something like Pandora, although not great enough to be convincing.