I have actually been to visit this museum 3/4 times, not out of enjoyment but because I was visiting with people who haven't been before.
I was happy to find that in my most recent visit the museum had been expanded and there was more to see. I found it interesting and there were a lot more interactive things than there was before.
It's a fun past time and if you haven't visited Amsterdam or this museum before it is definitely a must. It's also really good value for money, I think they have the price right, I wouldn't pay any more than it already is to visit.
It's fun with friends and also to visit as a couple, but I wouldn't go with my mum haha there are too many pornographic images and it would probably be embarrassing.
It would be interesting if there was more interactive parts and information about the red light district, as much as I love Marilyn Monroe I'm not sure what link she has with Amsterdam. I think if they bring in an audio verbatim like they do in the museum of prostitution that could be interesting.