This is a great location in the heart of Madrid. The host was responsive and accommodating. The apartment is very basic but has everything you need. We were able to wash several loads of laundry during our two night stay. The only downside is that it is a bit loud at night, but that is expected in a busy area of town.
We were concerned when we saw a review mentioning mold, but any mold issues appear to have been addressed. Would recommend a stay here.