This flat is in a great location with very easy connections to the city center. The double room was fairly large and the bathroom was also a good size, and clean. A couple of heads up (some of which will be in description): there are a lot of narrow stairs both leading up to the flat and within the flat. There is also a second single bedroom next door to the double, through which you can hear if someone snores or talks. There is a powder room toilet in addition to the main bathroom, although we never had any problems sharing the bathroom across four occupants in the flat. The host, Charlie, is very friendly, engaged / social, and is around the flat quite a bit as well. The deck is definitely a beautiful space and in the summer I imagine it is very nice in the evening.
Also on the last evening the host had a friend stay the night in the common space which was slightly surprising. If I would have been alone I may have felt more uncomfortable with that since he was asleep on the sofa in the morning when we came down to grab a few things from the kitchen.
Overall we enjoyed the stay -- great location, comfortable bed, warm bedroom and bathroom, fair price for Amsterdam.