Putting lessons - Are they worth it?

Possibly but as I say, it depends what is wrong and how bad the starting point is.

Let's be honest, putting is not rocket science. You are moving a flat blade through about 18 inches of movement and trying to push the ball towards the hole. There isn't that much that you can tweak I don't think. Short backswing (low and slow), watch the putter hit the ball, longer follow through on the intended line, listen for it dropping. Job done. Repeat x 1000 and you will be a half decent putter.

10 minutes practice on your carpet at home every night for 2 weeks on 10 footers would be much more productive than a putting lesson but that is just my opinion.

I have had mates who have had putting lessons, video putting lessons, custom fitted putters and sensors on their bodies and clubs to measure everything to the nth degree. All of them return from these sessions and evangelise about the new tip, new club, new stroke etc they have that has changed everything and that their putting woes are now consigned to history. Fast forward six weeks and guess what, none of them can putt for toffee.

I also know people who have never had a putting lesson, never change their putter, don't have the height of it altered or anything else. They are just really, really good putters and the thing they have in common in my view is that they all believe that they are going to knock their putts in, all the time. Putting is a mental thing predominantly I think.

But I don't profess to be an expert. Just my opinion and given that I have never had a putting lesson (apart from messing around with electronic gizmos, with Dave Hicks) then it is an opinion with limited validity I would say.