We had an amazing vacation in Amsterdam and the nice appartment was a big part of it.
We are a fimily of 5 as well and every member of the family found his perfect spot in the apparent, our 4 year old LOVED to play with the toys that were in the white closet, it was new and very exciting for her.
The rooms were nice and cozy, the canal view from the living room is beautiful and the kitchen is well equipped.
The staircase is different than anything we ever seen (it is very steep) and it might be difficult for someone who is not in shape, but for us it was totally fine and actually made us feel beter with eating the amazing Apple Pie Amsterdam offers. The appartment has anything and everything you might need, that was great! We would definitely come back.