as Christine and Martin, I was not familiar with SGT 365 and checked their website. It appears that they offer comprehensive programming, and, at $300, I can see the appeal. The credentials of the creators are excellent.
I have thought about group personal training myself and studied NASM’s approach. What I like about them is their approach to functional assessments in a group setting. I am simply paranoid about training somebody without an assessment, and they have some great suggestions for different group sizes.
I can see the SGT 365 as an adjunct to this NASM specialty. After all, just because you are buying pre-made programs does not mean that you need to implement them the way you are. I would view them as a menu to pick and choose from to best serve the need of the clients you have in your groups.