Pedro's place is the ideal one in Madrid if you want to be close to the main (cultural) attractions of the city. For us, almost everything important was in walking distance: museums, parks, city center, even the Calderon stadium. Same goes for the main train station, if you plan to travel to the neighbor cities. The apartment is large (there was an additional room where we could've stayed), clean, nicely furnished and quiet.
Pedro is a good host, even if we didn't manage to meet him in person, he made sure we are well received. Communication was excellent! We also received good tips from Cosmin (the guy we met when we arrived) related to the city and the neighborhood. He even provided drinks, some cookies and even a bottle of wine for us! That was a really nice surprise! We checked out late, but it was no problem to leave our luggage there and take it when we left.
What we missed was a larger bathroom with a larger shower cabin and some more natural light.
Other than that, everything was fine! So I'd like to thank for that again!