Stayed in this hotel with my wife and daughter. We were the only guests as July is low season and generally Sri Lanka is struggling with trying to attract tourists because of security situation with Tamil Tiger rebels. Don't be put off by this though. There really are no worries throughout the tourist areas especially in places like Bentota.
The Oasey hotel has a fantastic location right on the golden sandy beach. There is a nice pool if the beach is not your thing. We were allocated two fabulous rooms on the first floor that overlooked the beach. The rooms were spacious and well equipped, although our AC was not quite working properly our daughter's was very good. You did notice a musty smell when you entered the room and I think this is a problem throughout the country as there is so much humidity especially in the summer.
The room was kept very clean and there are nice touches like towels for the beach/pool provided along with water cooler in the lounge area outside the rooms.
The owner was attentive to all our needs and organised a mini bus to collect us from the airport. He also organised a two day trip with mini bus and driver so we could visit some of the other areas like Kandy and the Elephant orphanage (well worth doing this).
The hotel provided great breakfasts, more than one could eat and the meals for lunch and dinner, although basic were acceptable.
All in all the Oasey provided great value for money in a fantastic location. I imagine it will be a lot busier during the high season and if you like swimming in the sea don't go in the summer as the waves are too big.
I'd recommend this hotel if you like smaller boutique type places to stay.