Ricardo is a great host, friendly guy and his apartment is very conveniently located near the metro and an easy walk to the Zócalo. The apartment is clean but basic, and the room has a small desk and very firm queen size bed. The main difficulty for us is we happened to be there when it was both hot and there were also mosquitos. The windows have no screens in the building so if you want fresh air while you sleep and it's during the mosquito season it's tough. In the cooler season and when there are no mosquitoes around it shouldn't be a problem.