This is the best location EVER! We walked everywhere! And there are so many cool places we ran into to while walking. We had an amazing time, and big part of it was because we didn't have to worry about finding a bus/train station and wait for it. But if you decide to take the train/bus (you won't need to) they are everywhere.
Unfortunately, Kristian wasn't home and we ended up not meeting, but hopefully will be able to next time. But his friend was there to welcome us and show the apartment. We felt very welcomed.
The room was very clean and the bed was super comfy. You won't have to worry about any noise there. Kristian left us a map, which came in handy.
I totally recommend staying at Kristian's place to anybody that wants to be right in the heart of Madrid.
Thank you Kristian! Hope to stay at your place again on our next trip to Madrid.