Excellent host and accommodation. Carlota is the most hospitable and accommodating host I came across on Airbnb. Communication was always quick and easy, as was the check in process (even though my plane was delayed). The location is very central, the flat was very clean and despite being bellow street level always felt homely and fresh (not muggy). The bed was really comfortable and everything worked well (internet, AC, TV, shower, etc).
At this price I don't think there is a better Airbnb in Mardrid. Strongly recommended!