The assessment was invaluable. Was done fall 2018. Son learned a lot about himself as a pitcher, the condition of his arm, and how his body works. He loves working one on one with his remote trainer, who is a MiLB pitcher. He is getting him ready for the next level, as he is committed to play in college.
Our primary goal with the program was preventative arm care. He had no regular arm care routine in place before Driveline. After just a few months, he told us his arm felt better than it ever had. A year and a half later, that continues to be the case.
I can't tell you that Driveline is a magic bullet. I'm sure you already know that there is no such thing. If your son wants to see how far his body will take him, it will be a combination of training, lifting, eating well, sleeping enough, not drinking/drugs, and genetics. However, Driveline can be a big part of that. Players are doing something nearly every day of the week, and everything they do, is tailored to them and their schedule. In season and out. If you have an assessment, they will design a lifting program for them as well. It directly correlates to what they find in the assessment. Son had already been lifting, so his trainer just incorporated some things into what he was already doing.
....Has his velocity increased? Yes, but it has never stopped since he began pitching. So how much is attributed directly to the Driveline program, I cannot say.
If your son is a motivated and driven athlete, then I think the money will be well spent.