Overall, a very lovely stay in Madrid! Very central to lots of shops and restaurants. Walking distance (within 15 min walk) to most major sights. Definitely recommend for a short stay!!
I gave it a 4 star due to a few reasons.
Check-in: We had a rough check-in as our keys were not in the lockbox. Kristian, however, was very responsive and picked up the phone right away and resolved the issue. Somehow our keys were in the other apt he was renting to. Lift: The lift is midway between floors so you will have to walk up a few steps to get to it and then take it to 3rd floor and walk up more steps. It wouldn't have been bad at all but we were traveling with an infant so it was rough trying to get all our luggage inside the building and then in the very small lift. We had to make a few trips up.
Apartment:
Pros: exactly like the pictures. Very cute and comfortable. Lovely decor. Simple. Clean. Spacious for 2 adults and an infant. Cozy bed. There's a futon in the livingroom that you can pull out but if you are planning on using it, just bring your own blankets. There's heat in the bedroom and a portable heat in the livingroom. We didn't use the terrace as it was too cold and the view wasn't much to look at. But it gave us lots of sunlight. Kristian provided towels and shampoo/soap but we brought our own (travel size ones). Kristian was also very accommodating to allow us a later checkout as we were traveling with an infant which was extremely helpful. There's a small washing machine but no dryer but you can hang dry the clothes in your room overnight. Kitchen has microwave and fridge and coffee/tea machine.
Cons: wifi was wicked slow. The electricity went out 5 times on us. We called Kristian and he helped us right away. We ended up having to reset the box multiple times when it went out. Hot water ran out after the 3rd person (I gave my baby daughter a quick rinse, myself and husband). It was fine the next day when it was just the two of us. Walls are pretty thin because we could hear people next door or downstairs. But it wasn't too bad as most of the time ppl are out and it was fairly quiet. I just hope my crying baby didn't bother people too much. We also heard loud banging noises in the morning. And static noises at night. Not sure what was going on there.
Again, overall it was nice for a short stay. Thank you Kristian for allowing us to stay at your place!