Santiago is a great host.
He is really helpful and takes care that, as a guest you feel confortable in your room. I had to find the opening hours of a museum. He searched the information and had a map of Berlin to give me, so I could easily find my way.
His place is well-located in Berlin. It feels good to walk in the neighbourhood.
It's also pleasant to discuss with him as he is open-minded and knows a lot of things about different subjects.