Very close to five stars, but due to a very unstable and sometimes completely dead wifi, final score stays at four.
Except for that everything's really great, location is fine, quiet area, five minutes walk to nearest metro station that takes you into Amsterdam central area in less than 30 minutes.
Rooms are spacious, well furnished, the kitchen has everything you need for cooking, and there is a supermarket just a few minutes walk from the hotel. Bathroom is ok, both shower and bathtube, and the beds are comfortable. Somehow difficult to regulate the heating, during our stay it was really warm in the room, and despite the air condition, we were not able to get the requested temperature in the room without opening the window.
Staff are really great, 24/7 staffed front desk, and really helpful and nice people independent of time. English no problem at all, so you don't need Dutch language to be fully understood.
It's a perfect place if you arrives with car, since the parking is free and normally no problem to get a parking place. Easy to find, and you don't need to struggle into Amsterdam traffic, more or less motorway except for the last kilometres to the hotel.
All in all a fantastic place to very reasonable prices, the only issue is the wifi.