Martin's flat was a great place to stay and in a very central location. Close to the main bus station - Retiro. There are plenty of bars and restaurants close by, although these tend to be closed at the weekends so you have to venture further afar. Taxis are plentiful in Plaza San Martin so this is not a problem. Martin was very helpful and made good recommendations. He emailed every few days to check we were enjoying ourselves and to make sure everything was OK in the flat. I would definitely recommend staying in this apartment, it is great value for money and Martin is a very good host!!