So you don't actually get to skin-the-line you have to wait in line with your voucher to get a ticket. However, the line did move very fast at least when I attended on a weekday. The museum is very well organized and provides a free audio guide for the most popular exhibits and allows as many photos/videos of the exhibits as you wish.
I went straight to the service counter where they gave me my paper receipt, checked my coat I saw that others checked their luggage which would have been helpful to know about, and went through security check. Had a great time!