These hosts were great! Very quick to respond, providing all necessary information immediately and cleanly. They were also kind enough to suggest I check in a day in advance, since the apartment was not rented the day before my check in, and I was moving from another AirBnb.
The apartment itself is very small, the fold out couch creaks a lot and the lights in the bathroom were not working, but these were minor issues for me, as it was a very affordable price for an apartment almost right on the Lavapies Plaza. So central and close to everywhere one would want to go in the centre.
A great place to stay for anyone who only want a place to sleep and shower — which really is all you need in Madrid anyways :)