I would say one of the best things in Madrid was that I could stay at Rosa's place. She is such a friendly, energetic & lovely person. She takes care of the guest all the time.
It is a very nice apartment which is close to everywhere. (Atocha, the big three museums, plaza sol...) The room has almost everything in it: Comfortable bed & clean bedding, Big desk, wardrobe & mirror. Having a private bathroom is a big plus. The breakfast is good.
In short, I'd definitely like to stay here again. Tons of thanks to Rosa! :)