We booked this day in advance as a planned change of pace from theme parks.
Communication beforehand was excellent, including informing us well in advance of an unfortunate change to the plans (airboat experience couldn’t go ahead because not enough people had booked - airboat company’s policy, not city tours). Alternative choices were offered and arranged with no difficulty. Questions about the day were answered clearly and quickly.
The day itself was excellent. Robyn, our bus tour guide, was informative and amusing, but also allowed space for us to simply enjoy the passing scenery. She pointed out key moments, such as when to look out for dolphins and gators on the journey, and we saw some of both!
Kennedy Space Center is a wonderful experience. Lots of things to see and do - too many to fit into one day, but we did a lot! Highlights were the walking tour of the Atlantis Shuttle, reliving the launching of Apollo 8, and meeting an actual astronaut. There is a great indoor play area for children (our son - age 11 - loved it), with a bar for parents! Good options for food too, and a huge IMAX theatre. And everything included in admission.
So yes, a fantastic day, highly recommended.