We stayed here last week, for a week. Three adults and three children. Kids absolutely loved it! From the ladder. Like stairs going in to the "cupboard" bedrooms on the top floor. It's situated in one of the best areas of Amsterdam, easy to get everywhere in a short walk but also community like and quiet in the evenings.
My only gripe would be that there wasn't enough towels or tea towels provided. Every day was a constant washing process to keep up with 3 young kids and even though the dishwasher is a Godsend, one tea towel really isn't enough. It's not a cheap place to stay so I would have expected more. Also, we ended up leaving salt, pepper, oil, butter, milk etc in the place. I would have thought they would be there too, if it's constantly used.
Anyway small complaints, the place is great.