Everything was perfect. The apartment is very comfortable, with fully equipped kitchen and everything you may need. The location is very convenient, just 10min walk to the wonderful seaside of Perivolos, where you will find a great offer of bars with umbrellas and sunbeds or free beach if you like. If you want to visit the hotspots of the island a bus stop is immediately near the house (I recommend using it because the bus line is very efficient), but also a scooter/quad rental and a travel office are available right outside the apt. Other useful facilities you will find outside the apartment are a minimarket and two bigger markets and a bakery.
As for the host, Antonis is a great guy, he offered to pick me up at the arrival and show me around a bit, giving me great advices regarding what to see and places to go for good food. Stick to his advices and you won't be disappointed. He is very friendly and available for information you may need. I strongly recommend his place if you are looking for a trip in Santorini