This hotel has no air-conditioning, as others have noted. Our room faced a busy street, so when it was warm outside, it was loud when the windows were open. Our first night here, it was quite warm, so we had the windows cracked and a fan on, so the temperature was manageable, but it was noisy. Worse, there were mosquitoes in both of our rooms and our children and we got several mosquito bites. The noise and mosquitos made for a very bad night.
Phones didn't work in our rooms, which created some difficulty when trying to make some last-minute flight adjustments. I got several different answers when asking how to dial an outside number before it was determined that phones in our rooms did not work.
Breakfast is ridiculously priced at 19 Euros/per person, but fortunately there are decent bakeries and cafes in close walking distance. In general, food in the hotel restaurant is way overpriced. We did not eat there because there are about 1000 good restaurants nearby.
Most of the staff were friendly and helpful, but a few weren't. The rooms were fairly spacious and up-to-date except for the lack of A/C. The location is pretty good - near Rembrandtsplein, Koningsplein and a nice shopping street.
If you're coming in summer, it is probably worth it to look for a place with A/C. Otherwise, I would recommend this hotel.