First in 2010, we didn't like the way our 65 year old, short hair, felt after using, enough so that we didn't finish the bottle. Then in 2012, but didn't like that it seemed to leave our 67 year old hair dull and brittle, enough so that we didn't finish the bottle. 3rd time was a winner, love the scent and the way it leaves the 69 year old hair. Not sure about the thickening claim after one month.