Great location, very central to all Madrids top sights. Great Taverna just across from entrance.
Quirky little flat. Living room was smaller than expected but bedrooms of good size and 2 good sized shower rooms. Mattresses on beds very comfortable. Front bedroom experienced some street noise and from flat next door but back bedroom very quiet. Didnt have a problem with the low ceilings.
The 4 flights of stairs up to flat would definitely be a challenge for those not particularly fit.
Overall a good place to stay and no problems checking in. Good communicatiom from host also.