We're a family of four who loves B&Bs, old buildings and being central to major sites. A lot of emails were sent (it is quite difficult finding reasonably priced one room B&B that fits four in Amsterdam!) before I finally received a promising reply from Vicky.
Before I continue, if you have a physical mobility, stop reading and look for a different place. Maybe a boathouse or a new/chain hotel with an elevator. Stairs are typical of old Amsterdam homes. Steep, narrow, and abundant! If you have gigantic luggages, I am sure Vicky can help but just FYI. Moms with young children need to make sure you carry or hold their child. Ours is 9 and 4 and they/we managed just fine!
We arrived early via ferry from England and Vicky let us store our bags upon arrival (11a) and gave us a key. The B&B was centrally located and while on a main road, was quiet inside. Our room was at the very top and spacious. We had a Queen (UK King) size beed and the children's sofa bed was as spacious and comfy. There was a tea/coffee making area, fridge and tables + chairs. Breakfast for us was in their dining room and was lovely and abundant. Since Vicky only have boys for children (lovely well behaved boys), she spoiled ours girls and I think she would have kept one if we let her ;)
Payment was cash only but there's a cash machine right outside the door. Easy!
The B&B was a 20 min walk from the station. Trams are 5 min walk away. We walked in but tram it back to the station.
I highly recommend this place for an affordable, central, clean and family friendly stay. Unless we rent a houseboat next, we will definitely stay with Vicky again!