I enjoyed my stay at Roberto's apartment. Check-in with Luis went great, he's very nice and introduced me to the space. The apartment itself is quite spacious. I was traveling alone and thus did not need the second bedroom. This space can comfortably sleep 4 people. The apartment is standard and clean.
The only downsides that I found were the following: (1) The bathroom is quite small, which was only somewhat uncomfortable for me but if you're larger (height or weight) you'll likely face some discomfort here. (2) The flat is on the first floor so there's no natural lighting, which was a bummer but not a deal breaker. (3) At night it got rather cold and the heater provided doesn't work very well. Roberto provided plenty of blankets and sheets, however, so I was fine whilst in bed.
Roberto was available whenever I had any questions and checked in on me to see if I needed anything. He also left some nice snacks and drinks :)