If you are planning to go, know that it is a very popular site and there are a few rules it helps to know in advance. Tickets can only be purchased online, here.
80% of the tickets are released exactly two months in advance at 12.00 hours. The remaining 20% are released on the website on the day itself at 9 AM. People waiting until the release on the day are often disappointed.
You have to choose an exact time and there is only a window of 15 minutes, so you have to arrive on time or you won’t get in.
Photography is not permitted.
The visit takes a little over an hour. There is also a half-hour pre-tour talk available for 5 EU.
There is a small cafe overlooking the canal and a book shop.
A pleasant way to get there is by hop on hop off canal boat, tickets can be purchased online, here, or onsite at many ticket offices along the canal.