it probably takes at least a half a day to see the best parts. this includes you having to purchase a maximum access badge to be able to take the bus tours that include the apollo mission exhibits. if you enjoy the history of the space program it would probably be a worth while trip. on a side note, we ate a meal in titusville at a restaurant called "dixie crossroads". since the eating experiences seem to be a big part of the wdw/orlando vacation, this place was easily the best place we dined for the entire trip. if you like seafood it is really good.