Location: Margarita's place is located in the small village of Finikia which is roughly 20 minute walk to the major picturesque town in Santorini called Oia. We stayed for 5 days and loved it. To walk to the main parking lot in Finikia where the mini-grocery store is was a roughly 5 minute walk and from the parking lot to Oia is a roughly 15 minute walk. We originally had rented a car but didn't end up needing it for the full trip so on the 2 days we spent in Oia we just walked a lot and rented a car from Vazeos for day excursions to Fira / Black Beach / Red beach etc.. The parking lot is generally full in Finikia through July - September so my advice is to rent the cars for the days you need it and not deal with parking.
Noise: I'm a light sleeper and both the location (small village) and the unit renovations made it so I got a quiet rest.
Look/Amenities: This unit was renovated recently, everything is basically brand new. Living in this place gives you a cool look at the 'cave' style home without having to sacrifice any luxuries. Shower, AC, internet all worked great. In some places I heard the water heaters can run out, but 2 of us took showers here one after another and it was fine. This was one of the few places with a king size bed which was nice to have.
Food: We tried the 3 restaurants that are within the small town of Finikia. They're all roughly the same price (50EU for 2 people means 1 app + 2 mains). Lefkez, Mezes Mezes and Krinaki. All worth going to and all have different benefits. In Oia you have more variety but some of the prices are a little ridiculous but I suppose that's what happens in a touristy area.
Host: We were greeted at the airport with a sign since Margarita helped arrange the ride to the place. We were met at the Finikia parking lot by her assistant who helped carry the bags through the rough stone alleyway. While we never met Margarita, we saw her assistant in the town each day. Margarita helped us with a couple of last minute errands before leaving and responded to any request right away.
Overall a great stay if you want a place to have a quiet rest but still close to Oia.