I know you said rate the site, but I'm gonna be difficult and rate the music. I tried looking at it from all perspectives. Here's whatI came up with:
1. Fellow musician's perspective: Good drumming and guitar playing. Singing could mix in better, but from what I could hear it sounded good. If there's any bass, you can't hear it. Try lining the bass directly into a mixer, then hook the mixer into the computer's sound card.
2. Fellow drummer's perspective: Like I said, good drumming, but try placing some drum mics (not too expensive if you get the right ones) around the set and lining them into a mixer and so on and so forth.
3. Former guitar player's perspective: Awesome. mixed in perfectly. No complaints from me (then again I was never really that good).
Overall, pretty good, but could be better quality, even with the cheapest equipment money can buy.
For example, pull up this page (it is rap, because I couldn't find any good sounding rock on soundclick):
http://www.soundclick.com/therealist
Now if you don't like rap, that's ok. All you're listening for is how professional it sounds. From my understanding, that was done with Cool Edt Pro and a microphone that came with the computer.