I had the best stay with Hevert! I highly recommend staying with him.
The room is bigger than it looks in the pictures. It is clean and quiet, and has everything you need (a big bed, plently of closet space, blankets, towels, a fan). The location could not be better! Right in the center, close walking distance to everything, and plently of fun bars and restaurants right outside.
Hevert is a wonderful host and a lovely person! He is friendly and helpful, and made me feel comfortable, safe, and at home. Even though he doesn't speak English and my Spanish is awful, we had a fun time trying to communicate (with big hand gestures and hilarious google-translate mishaps.) I messed up my schedule (twice!) and he was very nice, relaxed, and accommodating. He even walked me all the way to my job on my first day because I was nervous about getting lost and being late!
Thanks for everything, Hevert! I'll call you when I'm back in Madrid! :)