I've been to the museum 4x. Each visit I spend some time just sitting there and trying to imaging what it was like that day. Imagine (if you want) Oswald firing from the window, running with his rifle across the expanse of the 6th floor, dropping the rifle and going down the stairs. I know, maybe that's all fiction but it's an incredible exercise to imagine what it would have looked like.
My only real complaint is the jewelry store exhibit of LHO's wedding band. I don't know why that is there.
I would like a red line in the floor showing the path he "might" have taken from the window to the elevator. But that's just me.