Hostal was ok, check in was easy and staff helpful, esp the night clerk. We had a double bed with single bed room for 3 inc 7 yo daughter. It could use a new coat of paint, but other than that was ok on inside, we were on "courtyard" section of building so no street noise per other reviews. 3 flights of stairs was tricky but not a huge deal. Night guy arranged taxi to airport for us in morning and came to room to make sure we were ready and help w bags.
Basically it felt safe and AC, shower, and tv worked fine. Was kept awake at 11p last night bc late arrival from chicago was unable to get into lobby area, so was pounding on locked hallway door (all hallways and street door have codes to keep out the riff raff). So if odd arrival time, better speak to someone in advance.
If you want to hang in mid madrid w easy access to metro and night action, this is ok option.