The hotel had probably only 23 rooms (that's what the porter said to me when I asked him how many rooms does the hotel have). But I think there are always several rooms filled any time of the day/night because the hotel is located on the second floor just after the airport entrance, so guests who need a few hours or several hours or even a full night in Medan can opt to stay at the airport hotel instead of leaving the airport. So you will save money on taxi trips, a lot of restaurants and shops inside the airport and the hotel also had its own restaurant.
But because the hotel is quite small, only 23 rooms, there are a few staff in the hotel and they typically know who the guests are. So if you are inviting someone to your room, that person might get asked by the staff there (this has never happened to me at any hotel but this hotel due to its size). The bathroom's water pressure was strong and hot water worked well. Notice that "strong water pressure and working hot water" are usually located at nicer hotels in Indonesian cities. This hotel was one a few hotels I stayed Indonesia wide that had strong water pressure and working hot water.
Staff shouldn't ask visitors to guests rooms any question. That is annoying. They even called me in my room asking if I was expecting a visitor. Just like if I rent or pay at any place, I had the rights to invite people to the room without the visitors or the room stayers being questioned!. So annoying.