I stayed in the Garden Room, just for 2 nights, although I wish I could have stayed longer. The room was wonderful (It was big, had everything I needed and more, and was super cozy/comfortable/gezellig), the owners were wonderful , the breakfast was wonderful, and the location was wonderful. It was all very relaxing, and I could walk all around the park or to some nice restaurants, etc. all within a few minutes, and it's just beautiful. It's also quiet in this area, so I slept very well with the windows open. (The modern air conditioning and heating options were great, but I didn't need them.)
I will definitely be staying here on every future trip to Amsterdam.