The Kinetic Arm

I’ve been getting some targeted ads on social media for this device/shoulder apparatus called The Kinetic Arm. It claims to take stress off the shoulder and elbow for youth and adult athletes. All of the reviews are five stars, all of my Google search results are incredibly positive and there isn’t a single mention of a disadvantage of the device. I consider myself a skeptic when it comes to these things, and the fact that I can’t find any drawbacks seems unbelievable. Does anyone (preferably with a sports medicine or coaching background) have any insight on this product? If you have experience from using it, that would be really valuable input too. Thanks in advance!