Stayed here for four nights and it was a great hotel. Paid extra for the premium room and the beds were really comfortable.
The location is perfect. It's not too far to get anywhere - you can be in museum square in less than 10 minutes, and dam square is only 15 minutes. The tram line is right outside the hotel which is really convenient and the Line 1 takes you everywhere you need to go. It is also very easy to get to the airport - it only takes about 35-40 minutes.
Our room was very warm upon arrival and the safe wasn't working, but one of the staff was really helpful and sorted it out very quickly. All of the staff were really friendly and helpful throughout the hotel, as well as the cleaners. It felt a very safe hotel.
The breakfast seemed expensive so we decided not to have it because there were plenty of other options in the city that were probably better value. There aren't that many good places to eat near the hotel but a few minutes away on the tram are plenty of good options.
The only problem in our room was with the shower, because water is all over the floor every time you take one, no matter how hard you try not to flood the bathroom! The rest of the bathroom is great, quite spacious (can't say the same for the room but it didn't matter too much). We had just a desk and small wardrobe but it was enough. Despite it being really hot the last couple of days of our trip, the room was still a nice temperature to sleep in. The television doesn't have many channels but that wasn't really a problem either.
Definitely would stay here again if I came back to Amsterdam. Highly recommended.