If you're looking for a simple, affordable apartment for 2 or 3 people with everything you need to come back to after a busy day in Madrid, Sergio's apartment is the way to go. My brother, my husband and I visited Madrid for the first time in August 2013 for 3 nights and Sergio played a big part in making our trip enjoyable. Once we arrived at his apartment, he was just one call away and met us within 10 minutes of our arrival. The apartment is on the fourth floor of the building with no lift, however Sergio helped us with our luggage which was very nice of him.
The apartment is exactly as described: a cosy loft right in the middle of Madrid, but had everything we needed including a washing machine which came in very handy. Being on the top level of the building in the middle of Spanish summer, the air conditioning came in very handy as well! The apartment is no more than a 10 min walk away from all the main tourist attractions, however I suggest getting your hands on a map of Madrid as the webbed streets can be difficult to navigate if you don't know where you're going. There are heaps of little shops in the streets around the apartment, including a great little leather bag store (and very affordable! ). Luckily there were some tourist brochures and a map in the apartment which we were welcome to use ( along with anything else in the apartment).
As soon as we settled in with our luggage, Sergio joined us for dinner, introduced us to the local cuisine and pointed out some good spots to visit. This was a great way get to know Sergio a little and a great way to get some good advice from a local. Sergio was easily contactable and made sure to keep in touch with us to check how we were enjoying ourselves.
In summary, with this apartment, what you see in the picture is exactly what you get, a cosy space to rest after being on your feet allday, with a very hospitable host.
I definitely recommend this apartment if that's what you're looking for!