I would highly recommend Edu's place to anyone who wants to stay in center of Madrid and not pay more than 40 Euros a night. Close to unique hip bars, traditional restaurants, the sights and the metro, it has everything you need. I wish I'd stayed at his place the first time I went to Madrid. It's a shared bathroom and kitchen situation but all common area were very clean and well stocked. Also, the interior decorating is amazing and give the place a special charm. Thanks Edu!