I had a great time visiting The Museum of Broadway on it's opening day. Rooms dedicated to various Broadway hits like Hair, Company, Rent and many others feature costumes, props and in some cases even detailed miniature sets from the shows - but also lots of interactive spots for photos and selfies. The result is a fun, engaging trip through the history of Broadway. The latter part of the tour is constructed to give you a backstage experience and a glimpse at what goes on behind the curtain.
One of the things that impressed me the most were the friendly, informative staff members in each room of the museum.
One note: some spaces are a bit narrow, so navigating around other visitors could be a challenge if the museum is busy (timed entry tickets help with this though), and it was clear that there were some features that had not yet been added, so the experience will no doubt continue to improve.