Have been studying in a group with it- it is the best study tool- there is a learning curve and you want to not just use one part of it to get the most benefit So when you train with it you also want to stop in spots and look at the ranges it is assigning the players to understand why it would take spots we would not- then take the time to reflect on our own Villain actions as so few players play GTO every street
I tried it too yesterday, and I think it's a very good way to practice, but if you want really learn with it, it costs a fortune (for me ) 69 or 99$ a month for a hobby player is an unnecessary thing you can buy 99 cans of beer