We didn't like the keysystem. The aircondition worked only when the key was in the keyholder. At night, in case of emergency, you would not be able to open your door since everything goes dark when you remove the key to open the door. The system should have some kind of delay function as other hotels have.
The best thing is the location on the beach.
With a stay at Sellada Beach Hotel in Santorini, you'll be on the waterfront, steps from Perissa Beach and a 3-minute drive from Perivolos Beach. Featured amenities include dry cleaning/laundry services, luggage storage, and laundry facilities. A roundtrip airport shuttle is provided for a surcharge (available 24 hours).