First when I saw the roof, I was bit skeptical as the size of the hanger didn't seem like a "museum" but believe me, this is a perfect example of fitting large under small shelter. They have nice planes and also nicer explanations.
The main attraction is 1549 (the plane that landed in Hudson). They have the real one along with videos and details.
There are some picnic tables outside and a small overlook where planes land, so try to be here on a clear day.
It certainly is worth a visit for any age group.
Last but not the least, the staff was very friendly.