I would try to stay away in the hotter times of the year. My wife and I struggled to sleep for several nights during our stay here. No A/C is as expected, but the room was very hot, sticky, and stagnant at night. There is a fan but it doesn’t do a very good job of circulating the air. The rest of the apartment seemed to be at least 10 degrees cooler (Fahrenheit) than our room at all times. My wife and I struggled to get even 4 hours of sleep on any given night during our 4 night stay.
Juan is an excellent host though, and gave us excellent tips for things to do in the area.
The location was also perfect- only about a 5 minute walk to the cathedral park and the gothic quarter area, and 5 minute walk to the nearest metro station.