I only communicated with Marijke a few times throughout the process of renting her apartment, but she was always very nice and answered all my questions in a timely manner. Her key service, KeyOk, is great as well, as they met my girlfriend and I when we arrived in Amsterdam around 12 AM. We picked the apartment because it looked homey (it is; the pictures represent it well) and because by looking at the map we thought we would be in a good location. We were in some regards (the bike rental and grocery store were only a ten minute walk away) but we were too far from the center of town to walk comfortably, and we wished we would have known this ahead of time. The apartment is not located in a touristy area, which was nice, we just wished we were closer to all the sights.
In regards to the apartment itself, it is evident that Marijke has poured herself into making it a comfortable space. We loved it in that sense. We were disappointed to notice, however, that the floors felt as though they had not been cleaned in weeks, and that there was old food left on a lot of the dishes.
Other than that, we had an enjoyable visit. Thanks Marijke, Douwe, and Jorge!