Great place, good exhibits, long queues! I bought the 'Lunch with an astronaut' at $69 tickets for my husband and brother-in-law, this includes entrance fee so not bad value. They thoroughly enjoyed the experience and knowledge shared from retired astronaut 'Anne Fisher', they didn't think too highly of the meal provided though. We purchased 2 normal entrance tickets also, what we managed to see was great however they were expecting 600 through the doors the day we visited so there were extremely long queues for the outside tours and extra charges for some of the interactive exhibits.we weren't able to queue due to our timescale so weren't able to undertake the outside tours, partly our fault but I wouldn't of been happy having to queue for over an hour either. Well worth a visit but give yourselves plenty of time to get a value for money experience