Carlos' home was in a great location not far from the city center. It is around a 15 minute walk from Santa Justa where the airport bus stop is and is in a nice, quiet, non-touristy neighborhood. He was kind enough to let us drop our bags off early and was always quick to respond. The apartment was clean and spacious and the rooftop was a very nice addition to enjoy during sunset and at night.
It was not much of a problem to walk to the different neighborhoods in the center but it was also convenient to take the bus. There is a bus stop one minute from his house which has 5 different lines and made our lives much easier. I recommend the app 'Moovit' as it shows live data when the bus shows up and how to plan trips around the city using public transit. I recommend this airbnb.