I cannot say enough good things about Maria's place. First off, the views are incredible. You can't get much better! Secondly, Maria's team of people made you feel like you were at a resort. She helped us to arrange a taxi from port, and a gentleman met us as soon as we got out of the taxi to help us carry our luggage down the steep stairs and navigate to the air b&b location (Oia is full of windy turns and stairs - Google Maps may not help you much). He gave us tips for the house (hot water heater, taxi info, etc.) and was so incredibly helpful. Next, her assistant Maria met us to give us about a 10-15 rundown of what to do in Santorini (places to eat, where to go, etc.). We also communicated with her prior to the trip to book a catamaran tour that was the absolute highlight of our trip. Every "t" was cross and every "i" was dotted with this team.
As far as the accomodations, make sure you pay attention to the number of beds/baths you get as the house features two separate levels that can be sold separately. We had everything we need (didn't cook), beds were comfortable (they even re-made our beds for day 2!! shocking for an Air B&B!).
Book it! You won't be sorry!