Yeah, I remember going as a kid (the Saturn V and "rocket garden" are what stuck with me and how I realized I'd been there before) and thinking it was great, but going again a couple years ago it was a huge let-down. So much of it was just ugly MIC sales powerpoint infographics with not-great accompanying displays of missiles and such, there was a whole area that seemed to just be a warfare drone military contractor showroom (which could be cool, but the presentation was about as boring as possible in this case), a bunch of the interactive bits were broken, most of the handful still working cost extra (and admission was not what I'd call cheap), and in general it just felt like a place struggling to survive. It gave an almost ex-Warsaw-Pact vibe of being well past its prime and decaying in place. The Saturn V is still amazing, though, but even there the little bit of the hangar floor and wall space that they actually bothered to use was given over to kinda-lame material about things like the SLS that also had a strong "this came straight from a contractor's marketing department" feeling.

I'd also been to the Cosmosphere as a kid (the SR-71 in the lobby is how I recognized that one when I returned, haha, don't see that every day) and have been about three more times over the last 15 years, as an adult, and it's still great.