I had a great stay at Gianna Suites in Santorini. I had an economy room and it was great. Decent sized room with a seperate large shower. I did find the bed and pillows very firm and the towels a little crunchy.
The receptionist, Katerina, was new. There for just 10 days. She was awesome. Very helpful sorting bookings and helping me find places. She went out of her way to assist. Pool area was great.
Location to Fira town is spot on. Just a 5 min walk.