This flat is in a great location so very central and we were able to walk everywhere. The hosts were good at communicating with us via email and really flexible with checking out times which we really appreciated.
We both has a brilliant few days in Madrid and would recommend this apartment. The only slight negative is that it can be noisy at night with street noise but there is double glazing and blinds which blocks out most of it. Given that you are in the center of Madrid a bit of noise can't be helped.