Qatar has many dental centers. It would be difficult for anyone to compare dental clinics and rate them unless someone has tried out several of them. You could try Al Rabeeh Dental Center on Al Rawabi Street telephone 4442 3127 and they appear to be good and charges are reasonable. I guess they have started business recently and are doing their best to attract customers. You can even negotiate the charges with the doctor as I did and he offered me a discount.
As for the comment of muad-db, just overlook it. The person writes just for the sake of writing with his post carrying no weight. He does this everyday.