I love the rock hall. I've been twice, and every time I learn something new. I could really spend an entire day there reading all of the placards, watching the acceptance awards reel, and looking at all the memorabilia.
Brought friends and they absolutely loved it. Only thing I don't like is the Mystery Train video on the bottom level. They spend way too much time talking about trains, and way too little time talking about the birth of rock and roll... very disappointing, and I would not sit through that video again.