It is great fun. Many museums are open until 2am, and with one single ticket one can visit them all. Time permitting. Yes, time is the biggest limitation: 7 hours sound like a lot, but, when there are so many museums to visit, they fly. And many people are around, so there can be queues.
My day:
- Rijksmuseum
 - Van Gogh Museum (only the temporary exhibition about Barcelona, I had already seen the rest)
 - De Appel
 - failed attempt to get into the Foam, the queue was too long
 - city archive (formerly a bank. The former vault of the bank has still steel doors)
 - Stedelijk Museum (only the temporary Warhol exhibition, and not even all of it)
 - Hortus Botanicus
 
