Good stay, Mati is a very friendly person and really helpful. It's a 2 bedrooms apartment that Mati shares with Itzi, a spanish girl. She is also very nice and she was always there to answer all my questions.
The place is at few blocks away from the metro and from the Abasto shopping center. There is also a big supermarket next to the shopping center where you can find all you need.
As Mati said in the announce, you will also have to share the place with his cat, Pituso.