Not M.
Google
Collection includes a lot of interesting scientific objects, but is kind of randomly divided into different rooms.
Entrance is not easy to find as signage is placed in front of the door with "no entrance".
Toilets are in basement, you can reach them only through elevator. They are stinky.
Ladies on the checkout were friendly, but I cannot say the same about other worker, older man. That was rather unpleasant interaction.
Worth visit if you have Zwinger-ticket, but I would not go there separately or second time.