If you are thinking about staying at this hostel: DO IT!
We were in a 6 bed room with bunk beds. The size of the room was great, there is a bathroom directly next to the bedroom which is cleaned daily. The beds are much bigger than in other hostels (120x200). The location of the hostel is not ideal (unless you want to go to the Inkarail office to get on/off the train). But there is a small green garden with flowers and chairs to relax in the sun. The internet worked well everywhere, even though there are several wifi connections, which is a bit confusing because not all of them work equally well. But apart from these little things, I can only warmly recommend the hostel. The staff was friendly, courteous and helpful without exception. The breakfast is extensive and delicious. There is also free tea in the breakfast room throughout the day. There is a bar, a pool table (which was a bit old and worn but it was still fun) and plenty of sofas and seating if you want to pass the time in the hostel. We spent one night in Aguas calientes and during that time we stored our backpacks safely in the hostel.