I recommend everybody to stay at Raul's place (except the one's who are bothered by climbing four flights of stairs ;)).
Everything was great. The room was incredibly clean and a good breakfast was included. We had ham, cheese, jam, toast, tea, coffee, juice and eggs.
Even though we arrived very, very late (after 2am) Raul still greeted us with a smile on his face and gave us some information about the city and how to get around. We got a tourist ticket for zone A at the airport. It wasn't valid for the train you can use to reach the center in one stop though. So we ended up taking a bus that takes a little longer but leaves right across the street. For us that was no problem at all. I just wanted to mention it so no one buys the tourist ticket expecting to be able to use the train with it.
The room has a fan and it wasn't too hot at all.
I could list many more things that were great about Raul('s place) but I wanna leave it like that: Just book there and make up your own mind. :)