Any of the Hank Haney schools are great. They are a bit more pricey ) $75-$125/hr depending on the instructor's level of proficiency. My wife gave me one lesson last year for our anniversary. In one lesson I was property swinging the club, and went from major slice to consistent straight/draw.
Sans lessons since, I redeveloped some old bad habits but once i really analyzed what i was doing, was able to correct it with what i remembered from the lesson.