An educational and emotional experience, worth the day. Recommend tourists see the Atlantis first, then take the center bus tour first, come back to see the iMax movies afterwards. Without a guide, I found that way was most efficient, and I even got time to visit the Angry Birds center and a couple of shops. Also don't linger too long in the rocket garden.
One of the highlights of our whole visit to US, our guide was Pete from Dolphin Tours and I can only commend him for his courtious manner, very informative chats and advice on planning your way around Kennedy Space Centre. He has a manner to engage most people on the tour and makes you feel comfortable from the start. The KSC itself is huge and everything is on a grand scale. The Atlantis experience and the Saturn rocket programme exibition was most impressive. The obligatory souvenir shop has pretty decent items and is worth a visit.
Would highly recommend it to anyone. At first we thought this tour would be a long day, then before we know it we didn't have enough time to see everything, very interesting for all ages