I had a very comfortable stay here. The twin XL mattress is perfect for us taller guys, the flat is beautifully done up, and Jimmy's hospitality is first rate.
I didn't know much about Amsterdam, coming in. When I mentioned to friends that I was staying next to Oosterpark, the response was always "Oh, that's a nice neighborhood," and it turns out that the flat is half a block from a green space and a tram stop with great access.
Overall, five star experience.