Carlos is a great host, attentive and patient. He is not close (30 -40 km). So familiarize yourself with washer, ac, wifi and key operation at checkin.
Place is a small and comfortable apartment, elevator and stairs are really tiny. So be aware when using them.
There is a good washing machine, but no drier, use the lines in the terrace.
Wifi is good, but spotty, take caution or have plan B if you plan to work from there.
Location is great, nearby city center, pubs and restaurants, neighborhood is not especially pretty; so exercise caution if walking at night.