Eh. My review score is mostly based on the experience getting in than the actual exhibit. If I were rating the exhibit itself I'd say it was a 3 or 3 and a half.
The reason dropped a star is because the tickets say on them that admission is until 9pm. Meaning you get there at 9 and you can finish your tour much like a restaurant keeps cooking. This was not the case. We got there at 830pm and were told "oh you only have 30 minutes the last tour was 8pm." While this is fine it should be stated on the ticket or when we purchased the ticket. This is definitely something that needs to be communicated.
The exhibit itself is fascinating. I studied biology in college and it reminded me of physiology class, except cooler. The vascular systems in the water were seriously worth the whole show.
The only thing I didn't like is you can tell it's dated. Everything just seemed a little dirty and sad.