This little gem is definitely a must when visiting Roswell. If you are even the slightest fan of UFOs and extraterrestrials, this museum is a good introduction. It is filled with tons of publications, articles, and pictures that recount what occurred.
Keep an eye out for a speaker and old radio in the corner upon entering the exhibit as this will offer a small sense of interaction with the items displayed. there is a red button you can press which allows you to hear a radio broadcast reporting the crash. There is also a small surprise in the center of the museum...keep an eye on the aliens!
Be sure to plan ahead and dedicate some time to look over everything as it is mostly a lot of reading. Alongside information on the Rosewell crash, there is also information on other cultures and their relationships to extraterrestrials, as well as "facts vs fiction" and pictures demonstrating people's encounters and sights of UFO and extraterrestrials. Again more reading, for this same reason this museum may not really be suited for younger kids.
Except for the gift shop, photography is allowed throughout which is another plus. Although there are many similar gift shops nearby, I feel that the one inside the museum is best for all gifts related to the Roswell crash as i did not see much or any of those items in other gift shops. So make sure to purchase those particularly at the museum.
This was a great experience and I believe that it is a must on anyones bucket list.