I can only echo the words of previous reviewers. We had an absolutely wonderful time in Madrid and the apartment was the perfect base for exploring and relaxing.
Sylvia and her daughter were the perfect hosts and we really appreciated the extra touches laid on to make us feel welcome and at home.
The apartment itself is so well appointed and stocked you won't ever want to leave! Having a great wi-fi connection was also extremely useful. It's in the perfect location, being away from the hustle and bustle of the central area but within close distance from the extremely cheap and efficient metro to take you all the main tourist spots, or even nicer, a saunter through the park. The area itself had a lovely mix of market stalls (food and niknaks), restaurants, bars and even an ice cream parlour so if you don't want to venture too far one day everything you need is on the doorstep. It also felt very safe.
I can only hope we can go back as soon as possible!