This wasn't a very pleasant stay at all. The (crammed) room that you get, with its glass doors, feels like an extension of the common/living room, although a curtain does exist to somewhat mitigate this. The problem really I thought was the lack of cleanliness: lots of cat hair in the room, particularly on the floor. As a cat lover, I know there's only one solution for it: frequent vacuuming, which the owner confessed to not having done upon my arrival, and it's hard to tell if she did subsequently (as she said she would), since when I was back I could still see hairballs on the floor and under the bed. The kitchen (which was really just a cubbard) was too unclean&crammed to be of any use, and did not have a sink. The bathroom was small but clean. All in all, this felt like staying with a relative who lets you use their spare box-room for free while you're in town visiting - NOT like something that you pay a non-negligible price for on an accommodation website.
So far this would have just been a mediocre stay, for which I would not even have left the appropriately-mediocre review, since the owner did kindly let me use one of her city-bikes. However the coup de grace was the disgruntled email I received from this owner upon my return home, in which she was accusing me of having burnt her tea towel (which I hadn't, in fact, even used/unpacked), having thrown a spoon in the trash and having not cleaned up after eating (both of which I'm pretty sure are not true, since I clearly remember having recycled all containers in the colour-coded bags provided, and put away the dirty dishes). The owner did have other guests over at the same time, although I doubt they too would have done any of that, as they seemed like a very civilised&friendly elderly couple. These false accusations probably just say something about this rather bizzare lady than about any of her guests.
From all of the above, you can probably conclude that I would rather recommend to you, dear reader, that you rather find a different place to stay in Amsterdam. There are plenty of nicer and cheaper ones, either on airbnb or on their competitor websites, which unfortunately I only later found out from my conference colleagues.