AWESOME place! I highly recommend it and recommend spending AT LEAST 4 hours in there to get the most out. The admission is $18/adult, so I'd spend time to get your money's worth and really, there's so much to see that you can easily spend 4-5 hours.
It's an interactive museum where you can listen to the instruments and dances of the different countries. They really put a lot of effort into the exhibits! The little headphones they give you will start playing music once you get close enough to an exhibit with a TV screen. We were there for about 3.5 hours and we could have spent probably another 2-3 hours in there. We had to rush a bit toward the end. Loved the Asia and Europe sections. The gift shop is also awesome- tons of different instruments for sale, lots of neat souvenirs and trinkets. I definitely learned a lot while staying engaged and not having to read a ton.