Good location for getting to the sites in Madrid with Metro station close by.
Flat is a little jaded, but worked OK for us.
Steps to the mezzanine floor on which the bed is situated are not for the faint hearted, and not great if you need to use the bathroom during the night.
Kitchen is very basic but will be OK for most people just eating breakfast.
The bathroom is well done, but the monsoon shower used the hot water very quickly so be sparing with the speed that you run the water.
The block can be noisy late at night and with the flat being near the front door all entrance/exits can be heard.