Marcos's place is at a great location if you want to be near the airport or waterfront. Easily accessible by the metro. Great bakery just opposite the apartment complex as well.
The room was very clean and as described in the listing. As in other reviews, the road can be noisy but I had a great night sleep with a par of ear plugs in.
I didn't have a chance to meet Marcos, but he was quick to reply to my messages on the airbnb app. His mom and family were very welcoming and accommodating, the language barrier did not cause any issues.