I keep seeing their ad pop up in my FB feed, and have been curious if it was gimmick or a decent hitting aid.
I used a Swing Rail for a bit this season, which really highlighted how bad I was casting my arms out in an effort to artificially try and create more wrist snap. In fact, it's a big part of the reason I had fallen into bad habits trying to push pitches that were well outside. At the start of the season, I was doing it well, but by midway through, I was basically popping up miserable sky balls to 2B.
Would be interesting to use a Camwood in tandem w/ a Swing Rail.