My husband and I absolutely loved our stay at Tessa's beautiful little place. She has designed the space perfectly and even though it's small, it's uber-functional and well laid out, and we felt very comfortable for our three nights there. The location is perfect as everything is easily walkable, but it's out of the main tourist areas, so it feels like you're a part of the residential neighborhood. Tessa was quick to respond to all of our questions. Only two things to note for future guests: yes, the stairs are very steep, just like all canal house stairs in Amsterdam - keep that in mind if you're traveling with a lot of luggage. Also, the windows aren't too sound proof so we definitely used ear plugs (even though the neighborhood itself isn't too loud).
We will absolutely stay here again next time we are in Amsterdam.