Marijke is a very nice host, and her apartment is convenient to multiple popular areas in the city. Museumplein is in walking distance. The neighborhood is great and her neighbors in the building are very nice (one even helped me figure out getting the key un-jammed from the front of the building!). We enjoyed staying here and you are able to really stretch out in her spacious studio.
The other thing we liked about the space is that the trams are very convenient. We always like to figure out the public transportation systems wherever we go and this place sort of forced us to figure the tram out.
One of the only issues we had was the bathroom was not very well lit. We were also unaware that this was a third floor walk up, which may impact your decision depending on how much luggage you have with you.
For the money, you won't get a better location or more space. We stayed here on our second stop in Amsterdam and I wish I would have used it for the first stop as well!