We've just returned from our trip in Santorini after a week of staying at Gasparis's place. We loved it - Gasparis is such a brilliant host; communicating throughout the booking process, on arrival and all throughout our stay, nothing was too much trouble. He was kind enough to collect us from the airport, and return at the end of our stay. This was our first AirBnB experience and Gasparis has set the bar very high!! Asterias is a great place, so clean with fresh towels and linens every day which we didn't expect. There was also some water in the fridge which was a nice touch. The place is super convenient, only 2min walk to the beach and close to a bus stop that takes you all over the island for 1.80-2.40€pp each way. We rented an ATV to get around too which was fun, and there is parking at the apartment. Perivolos is much less 'tourist' than the other towns, making the stay nice and laid-back compared to Fira or Oia. We visited all of the bars along the beach so one night we took advantage of the seating area outside of Asterias with some Donkey Brewery beers from a tasting trip. Gasparis arranged a wine tasting tour for us which is a must-do, as well as a sailing trip around the island. It's worth paying more for a more exclusive trip - you get a much better experience. Santo wines is a great spot for a tasting too and watch the gorgeous sunset.
Overall, I would take staying here over any of the luxury places in Fira or Oia - Gasparis made our stay perfect for us and we will definitely be returning!