First of all: Andrea is a great host. We did not meet in person, but Andrea was very helpfull from a distance and through a friend of his.
The appartment is rather small, but offers all basic necessities. It is locaties close to the metro and bus stop. Tip: using the metro, you should get of at Alto de Extremadura to go to the appartment. That way, you walk downhill, as the area isn't called Alto for no reason. Puerta del Angél is closer, but harder to walk.
Not much further to add to the remarks above.