My experience was awesome! 5/5, my only bummer was the size of the bathrooms.
Location: Not only is it directly across from the beautiful and leisurely Vondel Park, it was a very short walk to the museum square (where most of the major museums are located). Quiet but lively area.
Staff: Super friendly and welcoming! Knowledgeable about the area and city. couldn't be any better, felt that I was in safe and genuine hands.
Facilities: *NO ELEVATORS* so this may not be the best for anyone who requires an elevator. The stairs are also very narrow, this is common throughout the city though. The stairs were not a problem, otherwise. The staff also offers to assist you in taking your luggage upstairs if you do need the help!
The bathrooms are kept very clean, but please know that they are very very small (and I am a short and smaller-sized person!). Bathrooms are separate from the showers.
The rooms are clean and have nice lockable cages under the bed. They would not accommodate a very large suitcase, however. They have external lockable lockers for that. You can rent locks cheaply at the front desk.
The smoking room and bar area are very cool! Having a smoking room was incredibly convenient, and great for socializing around the pool table...and yes, it is 4/20 friendly. :-)