We stayed at Blaines B&B with our children (4 and 8 years old) in the loft on the 4th floor (the staircase is narrow, but this seems to be normal for Amsterdam) with direct access to the beautiful roof terrace.
The loft with its private bathroom was the right accommodation for our family and well equipped and comfortable.
The position of B&B is ideal because it is located in a quite street in a nice quarter with restaurants and shops and near the Vondelpark. From the nearest tram station it takes about 10 - 15 minutes to go to the Rijksmuseum or the centre of the city.
An absolute highlight of this B&B is the delicious and very varied breakfast. Peter and Blaine were very helpful and friendly.
If we will stay again in Amsterdam, we will try to come back!