We came for a week; our first room was on the third floor and was both very small and VERY hot (Amsterdam was having a warm week). We asked if they could move us, and they gave us a room that was much better, with a/c and a bigger bath. The staff has been very helpful throughout our stay.
The location is just wonderful; the street is pretty and quiet. It's a short walk to the tram station, and there are lots of restaurants and shops around it.
Worst part was the beds. The "two singles" are tiny beds, each barely big enough for a person, with feet hanging over the end. Our first bed was a double, which was far too soft.