The house is indeed located in a large field of wine grapes in a rural area on the southwest part of Santorini. It is a few minutes drive to a lovely stretch of beaches with scores of shops, restaurants, and nightlife. Since there are no other houses nearby the property it is very quiet, but some sounds carry at night from clubs a kilometer away. You will need a car to get around the island, and the city of Perissa is very close and has everything you would need, including a laundromat which takes your load in the morning and has it all clean and folded the same day for 9 euros.
The kitchen is very basic, in greece the microwave and hotplate burner are the same device! But in reality you tend to eat out most meals, so it wasn't a real issue. The refrigerator was full size, which is more important, with a large freezer section.
Only drawbacks were lack of air conditioning and no wifi at all. The main bedroom has double bed. There was a oscillating pole fan however, and the nights cool down if there is an ocean breeze. Wifi is available at virtually every cafe on the island.
The main town of Fira is about a 20 minute drive away. On one day 5 cruise boats disembarked literally thousands of people into the core at 7am for the day, which made us appreciate our quiet retreat very much! Oia is another lovely cliffside town on the far side of the island, perhaps 45 minutes drive away, and the cruise boat people get there too! There are some lovely wine museums that offer historical insights into Santorini life and history. The Koutsoyannopoulos Wine Museum is a great example.
If want a place to stay away from the crowds, but near to the ocean and services, Mario's place is ideal.