5 nights in room 3 (Earth). There is no 24/7 reception as advertised. In fact, there is no reception. There is a desk and computer in a corner of the cafe/restaurant. For any help you need to find a member of the serving staff.
The staff themselves were friendly enough, but this didn't make up for the room/'hotel'. The room was basic. The toilet seat was loose and the toilet would run (noisy). The shower head was poor with water leaking from the frame of it rather than the nozzles.
We were also without hot water for a fully night and day, and only when we complained in the morning were we told that it should have been sorted the evening before. It wasn't, but was sorted by the following evening.
The bed was old and creaky and the walls thin. When any other guest closed a room door, the wall shook with it. (Also beware; steep stairs aren't for everyone)
The room was cleaned every day. The room cleaning started at 0800 and the vacuuming of the nearby rooms ruins an opportunity for a holiday lie-in.
In all great location next to Dam Square, but really poor for the price paid.
My recommendation, find somewhere else even if it costs a little more.