I like that it was quirky and funny. I have no doubt that they were trying to copy Still Alive, and it seems just as good as Still Alive in terms of actual lyrics and beat (especially the piano tune, I agree that was great).
The thing is, Still Alive was great when I heard it before I played Portal. After playing Portal, it's more than just a good song, it's an excellent ending and makes me wonder if GLaDoS wasn't just testing the ASPHD the whole time instead of actually being evil. This song is great sounding, but it probably won't have the impact end game that Still Alive did.
EDIT: Oh yeah, I forgot about You Have to Burn the Rope. That song was almost as catchy as Still Alive.