The obvious museum pieces like the guitars (Uncle Dick, the five necked monster, a Brian Jones guitar, etc), posters, and plaques were great, but it was the ephemera that got me to stay for 3 hours. Rick saved everything from notes handed to the band on stage, equipment receipts, fan letters, rejection letters, etc. For the most part, the entire exhibit is one giant room, but it's loaded and displayed incredibly well.
I've been to the Rock and Roll Hall of Museum in Cleveland several times, but I think Rick's Picks does an even better job of capturing the excitement of rock and roll. I'm hoping to make a second trip in the next few weeks to see it again before it closes in April.