This place is really good, you can see a bunch of old stuff and they are amazing. However, the best part is the Saturn V Hall! It is AMAZING! You can spend 1 2 hour easily with just running through the halls and check the exhibitions BUT I would recommend taking a guided tour in the Saturn V Hall. We were lucky and the 5 of us were guided by Lowell Zoller. He was a project manager at Nasa telling amazing details of everything. We wanted to spend maximum an hour in this hall and finally we were there 2-3 hours! And we wanted to stay but the place was about to close so ... Anyway visit this place and have a guided tour!