Charo is a very hospitable person- she immediately makes you feel as a member of her family, especially if you speak Spanish! She also sends you a few emails before your arrival full of information concerning the whereabouts of Madrid.
The flat is a very central one, and although it's in a very busy area, you don't hear anything from your room! The place of the room is also ideal because it's somehow separated from the rest of the house but next to the bathroom and the kitchen.
A great opportunity to experience Spanish hospitality!