This was surprisingly probably my favorite stop in Philly. It was a self guided tour with earphones. I found it very interesting as did my teenage kids.
You could walk around and look at displays after. They had a certain political point of view. I generally agree with it, but just a heads up if that bothers you.
Dress for the weather if you go. It was cold inside on a 40 degree day. I’d imagine that advice goes for any temperature. This is not a criticism; simply be ready for it. I’d estimate an hour and a half is a good amount of time to block off for this trip. More