First of all, big thanks to Guillermo and Pedro for making my arrival so much easier and explaining me all details and answering my billion of questions!
Now let's go to the other important part - the apartment. A super cute and cozy place where you can comfortably stay 4 people without any issues. As well you have fast internet, air con and all you need to stay there. Still, since we know we are going on trips to roam around - Guillermo's place is spot on! in the hot zone of all central sightseeing and main streets, it is also surrounded by the party places and also some cute and petite bars and restaurants and 2 mins on foot from the Metro station, in case you want to explore beyond.
Once i'm back to Madrid I would totally stay with Guillermo again! Thanks for making my first time to Madrid so accessible to everything :)