I was there for the Adult Night, we got a little late so we were in a rush to see everything but I loved it.
Yes is a bit pricey, but think about it, getting the membership is a much better deal. They are still very new and knowing some of the people that work there I can say they are doing their best to make it exceptional and unique for kids, teens and adults, so don't give up on them so soon.
I will definitely go back to Adult Night and other times when there is new exhibits!!!