My mum and I enjoyed our stay at his apartment a lot, the interior design is just as nice as it looks like in the pictures, it was super clean, well-equipped and we could reach the train station within a 5 minute walk.
At our arrival he gave us a lot of useful information about the city and had prepared several maps we could make use of during our days in Madrid. I would always want to stay there again and can only recommend this place to everyone!