Really nice and central apartment. We travelled with 3 kids and were able to discover most of Madrid by foot or subway.
Everything was perfect, except for the parking situation. The tip we got for where to park our car was rather unclear (maybe due to communication problems). We had to park the car extremely far away (30+ minutes by foot) and still got a ticket that cost us about 120€. That was unfortunate, since we had the option to park the car in a nearby parking garage for 90€, but were told that parking was free if we moved the car to a certain area outside the city center.
Still we had a perfect stay at Sergios and can of course not make him or Elena responsible for our mistake of coming to Madrid by car. 😅