These are encouraging reviews. I've tried similar products in the past without success and have found much better results in working with a coach. I do like the idea of something I can swing in the garage to instill the correct swing motion
I would ALWAYS choose working with a coach over a training aid like this. But...I always look at these devices as being intended to be used in tandem with hands-on coaching. They're training wheels to help reinforce the feels that the coach is trying to ingrain. And for that, this is really good