I want to start by saying Vanessa and Oscar were the perfect hosts. I only had the opportunity to meet Oscar in person but Vanessa played a very important role as a host as well; she made all our restaurant reservations. Oscar also helped set up a taxi for our departure to the airport which costs only 25 euros compared to what we paid when we got there which was 38 euros.
The apartment itself was perfect for two people but a third would've also been just fine. The bed was big, the couch comfortable and the unit was equipped with everything including an iron and blow-dryer. Unit has lots of windows and natural light and boasts a modern decor, something that was important to me and my friend. This unit also has AC but we never used it even though it was 80 degrees out. The big open windows gave us the right amount of outside fresh air.
The unit is on the third floor with no elevator but that's pretty normal for most places in Europe. We didn't have any issues with this at all. It's also centrally located to all sorts of visitor sites like the Prado museum and shopping plaza (Plaza Mayor). These places were 10-12 min walking distance. Also around the corner was the metro. Easy to take to and from many sites as well.
I would definitely stay here again