Thank you all for your input. I have a simple set of old trainers by "Elephant" that work really nicely, but I thought these might be helpful for choosing the OB spot with ease from behind. From there, I don't know how valuable their Cue Ball is, but finding the aim spot on the OB looks like it would be very easy. Not sure whether to pull the trigger, but always looking for something to interest family and friends in learning to play, or play better.
If I decide to give these a try, I will give them a fair try and write a review. While these will not be the worlds greatest, be all, end all, or they would have already been wildly popular for years as it seems they have been out for quite a while (since 2015), they may still be a good aid for brand new players to spot the contact point.
I was just hoping someone here had already tried them and had some feedback one way or the other.