It's a much better museum if you are actually an airplan fan to compare to the Air and Space museum in Washington, DC. It has the recent Discovery on the display as well. For those who is interested in the modern aviation there were not as many planes as I personally expected. The museum at Wright-Patterson AFB has probably 10 times more moders planes than this one. On the other hand - it's better, than nothing.
And $15 parking fee is really too much for 1 1/2 - 2 Hrs the average person would spend in the museum.