Overall I had a great stay at 4bears for the price. I really like the interior design and it was also really really clean for something like a hostel. The location is also just perfect to explore Madrid, there's everything you need close by. One thing that made me not give the full 5 stars is that the pictures present the room way nicer than what it actually looks like. I just expected something else even though I knew that there will be 10bunk beds in the room. As it had no A/C, you can imagine that the air inside this room was really bad, I woke up sweaty in the night to open all windows and the door to the room. Anyways the check-in was super easy, the hosts were really nice and helped me to find my bed and the bed itself + the locker were really clean and useful. Would definitely come back again but book a single room instead ;)