Apollo 12 is a must-see for space fans, but the scope, pricing, and maintenance of this museum leaves a lot to be desired.
Perhaps it is simply the off-season, or poor timing, or I'm not the target audience, but as great as it is to see Apollo 12 and other sorts of interesting aerospace history like the YF-16 and the F-18 HARV, there are a few (mostly maintenance) issues with this museum.
Coming from the larger DC museums, it can hardly be described as a "large" location. This is a smaller location outfitted for field trips and group activities rather than museum-goers, and is largely kid-focused (not always a bad thing). There are a few pieces of unique history here that people should not miss, but equally a lot of video-game distractions that anyone could play anywhere for free, likely with more functional controls.
The admission price is not unbelievable, but I would not call it a "bargain", even with the "free IMAX" inclusion. The concession prices and quality are quite poor. At least one bathroom faucet was broken loose in its mountings, and the other one did not function.
The IMAX theater is quite well maintained and reasonable, the projectors work as they should, and the 3D calibration is very good, overall a reasonable experience, but quite obviously a padding technique to keep you in the building longer.
I personally cannot get enough of space/aerospace history, so I find it hard not to recommend this location, but for the average visitor, it might be mildly underwhelming. Maybe it is a better value with a membership for the local visitors who want to bring their kids in to a fun locale for the weekend, or teachers who want a science camp.