I'm going to divide this review into 2 sections: 1) The Atomic Testing Museum and 2) Their Area 51 section.
1) The Atomic Testing Museum is fantastic - very well done with multiple films, lots of interactive displays, actual rockets and period displays. I've been to a lot of museums and wow - this one is pretty fantastic.
2) The Area 51 display is NOT WORHT IT. It looks like a grade school science project. If you watch the TV shows about alien conspiracy - then surely you've seen it all before and you've seen it 99x better. It's not worth the additional money. So, pay for the museum but not 51.