I stayed at Mario's apartment for a weekend in Madrid and it was great! The house is huge and just beautiful, carefully decorated and in a perfect location near the metro (O'Donnel and Goya). We really felt home and cuddled :D. Unluckly Mario wasn't there but we stayed in touch before our arrival and during our stay. He has been always available for planning our trip and for giving us great advices...perfect host! Totally recommended :D