Posted August 1st, 2012, 10:24 AM
Just a heads up in that you will not get to see much in just a few hours. In the end, it will end up being a waste of money (JMO). This is something that you really need all day for. We spent 8 hrs there just last year and still could have spent another 1-2.
Keep in mind, that you also catch a bus over to the Observatory, which will take extra time. Last year we waited nearly 30 min for a bus, even though their website says they come through every 15 min. We weren't in any big hurry, so it was not a big deal for us. In your case though, it would be a HUGE deal if they are not on time.
Also, arriving to MCO at 2pm, with a 4pm departure is a little too close for me (another JMO).
The Space Center is great to see, so if you go, have a great time! It will be short though and you may not enjoy it as much since you will be watching the clock constantly.