I looked into doing BBB, but I just couldn't justify it. I don't think they do the same "magic" with the adults, and it felt like I could go to a spa at one of the resorts and get pampered better for the same money. I also didn't like any of the three hairstyles. I kind of want the dress and the whole experience, and since they don't do that for adults, it didn't have the appeal for me. That having been said, if you want it, go for it!
My DH, though, got his hair cut at the barber shop on Main Street, and he loved that. They won't cut a Mickey head into your hair anymore, but they do paint in a Mickey using this goo stuff that was surprisingly resilient for being a washout (it came out in the shower pretty easily).
If you happen to be going to the princess 1/2, they do discounted BBB hairstyles at the expo, and they'll sprinkle you with pixie dust for free.