The videos they use to market the product look awful to me- bat drag city.
As far as a training aid that doesn’t require much instruction, you might look at the half bat trainers. Pretty straightforward, a lot of good can come from whacking foam and tennis balls with one of these.
Adult 33 inches 19-20 ounces - Typically used from 12u & up Youth 30 inches 14-15 Ounces - Typically used one handed or 8u & 12u 27 inch 12-13 ounces - Up to 8u or one handed work We pride ourself on high quality. The half bat product is very well structured and stained Used for training off...
I use the hitting disks and the half bat with a lot of success. What Shawn said can be true if you just set kids loose without any instruction/directions on how to use the disks. I find the disks to work REALLY well when done correctly. I have a hitter who went from having huge bat drag with both elbows leading the way to now starting to feel where elbows should be and how bat path should look. Giving a target for the disk is huge, also, starting slow and having them end at extension starts to help hitters feel how their body should feel throughout the swing.
Personally, I would highly recommend the hitting disks, but they do require instruction and monitoring to ensure they are effective.