Here is what I can tell you.
I am here in Atlanta.
I respect Tierson (the inventor) tons.
He runs a legit business (pays the insurance), he is in it for the long haul, he is a very smart person, and he is also a really nice guy.
When I bid against him, I think I lose jobs sometimes because I talk him up so much.
Anyway--- As for his invention, If you own a crane and you do a lot of removals, I would think it would be priceless.
I can tell you that the thing is super fast.
Tierson graduated from GA Tech as an engineer (I think mechanical).
Anyway, that is my two cents.
I feel the same way abour Don Ryan's products too.