We stayed one week in Ritsa's hotel and it was very good, the bedroom are spacious and cleaned everyday.
The swimming pool is very nice and the breakfeast very good with different choices.
There is a bus that can bring you to Fira or Oia at 4min by walk from the hotel. Ritas gives you all the advices you need for the different activities you can do in Santorini
Everyhting was great ! I recommand this place.