I had the pleasure of staying here for a month in August and loved it. The flat is tastefully and uniquely designed. From the globe lamps to the yellow rubber ducky in the shower there has been true thought crafted into the rooms that makes it feel comfortable right from walking in.
My favorite part was the large windows that overlook the park. I worked remotely from the desk and couldn't ask for a better work station. The space was very clean on arrival and the shower/bed are great.
The neighborhood is also beautiful. Tucked away from the tourists it gives a local feel without being too far. Grocery, coffee shop, restaurants, laundry, bike rental all just steps away.
I highly recommend it for a longer stay. I couldn't have asked for a better place to call home for a month in Amsterdam.