We're just come back from Santorini, wonderful little Cycladic island: we stayed at Kelenis Apartments, after making reservation via web. The apartments are quiet, clean and beautiful, linked to Ikaros hotel, located in Karterados, at the center of the island. At few steps there are buses from/to airport, Fira (the capital, full of shops and restaurants, 2 km away), Ia, and other villages and beaches of Santorini. But the best way to visit the entire island is renting a scooter or a moped.
Kelenis apartments are six and share a pool. Me and my wife had one (kitchen-dining, bedroom w/tv, bathroom w/shower, little terrace) for a week; towels and linen changes, cleaning every day, free park, breakfast: all was included in the fee and we found it absolutely convenient.
We loved our stay, thanks also to the joung manager Stathoula, always nice, helpful and hospitable; her suggestions on places to visit, restaurant for dining, etc., were definitely right and appreciated. If you want to taste very good typical dishes go to Savas Restaurant in Karterados: quality & cheap prices. In short, a stay in Santorini really beyond the expectations.