Bring extra towels for extended visits because there is no washer on premise, unless you want to go to the laundromat. Also the apartment is smaller than expected and there is little ventilation (even though there are windows) so the apartment gets warm quickly (even with 60 degree nights) as there are no fans provided.
Be mindful there is a refrigerator but no way to warm any leftovers.
Check in and check out was great and it’s located in a fantastic location. You are 15/20 minutes from almost every attraction/sight you want to see and very close to the hop on, hop off boat and the train from Centraal Station.