I had a wonderful stay at Carlos and Frank's place. Frank greeted me at the door and gave great advice about local places to eat and buy groceries. He was excellent at responding by text to any additional questions I had, and even arranged for a taxi to take me to the airport at the end of my stay. The apartment was spotless and well maintained. It is in a location that allows you to get all around the city with ease, either on foot or by public transport. I highly recommend it.