Maybe it's just me, but this museum left me wondering if they didn't have another hall that had more exhibits.
The building is quite amazing. The view of Lake Erie is a fantastic site, especially in the summer on a clear day when you can see out the windowed architecture. If you have a fear of heights, then take the elevator to the top floors. You can find it hidden in the rear of the museum.
The top floor is the one that is written about and is featured in many articles written about the museum, but it didn't do much for me when I finally saw it. Each of the inductees has a special "window" that has their signature and an image of the person at the height of their career.
Parking is in the paid lot adjacent to the museum or on the street, if you don't mind walking nearly 20 or so blocks.
The fee to enter is outrageous. They have music by John Lennon donated by Yoko Ono and the Door's Jim Morrison's cub scout shirt. Odd things are featured--like a case of hotel and motel keys stolen by one of the Eagles.
If you are rock music MAD, then this is the place for you. For the rest of us, save your money and buy current CDs.