Me and a friend stayed at Martin's studio in Recoleta in May 2014 for four days. The studio was clean, very cute and in a great neighborhood. Martin gave us great recommendations for nearby eateries which were excellent. Martin was also good at communicating about issues with the elevator in the building and offered us options prior to arrival which was very considerate. He offered his help and made himself available to us in case we needed anything during our stay.
My only issue was that upon our arrival Martin was not at the apartment to help us into the apartment as we had discussed prior to our arrival. We had to wait approximately 45 minutes to be able to get into the apartment until he arrived. After a long flight from the US and arriving at night this was not ideal as we had to wait outside the building for some time in an unfamiliar place.
Apart from that, I would recommend this place as it is a nice home away from home in the city. If you like to sleep in, the apartment can be a bit noisy in the afternoon during the weekdays but otherwise is quiet at night and early morning.