I ran it this past March. I thought the course & crowd support were great (it was St. Patty's Day, which made it a fun/festive atmosphere). But I was not all that impressed with the logistics (crowded, not-well-signed starting area; small, crowded finish area, etc.) nor the "rock-n-roll" part of it-- seemed like half the bands were in between sets when I ran by, so I probably only heard about 3 bands during the entire 13.1 miles. (Maybe that was just bad luck on my part.)
I've run tons of races over the past 20 years, but this was my first R-n-R event. Like I said, overall, it was a good race, but I don't feel the need to become a Rock-n-Roll groupie or anything.
Good luck!