It's on Netflix now, at least in Canada. Some spoilers below.
I didn't think it was amazing, but it was watchable. Rich Piana actually looks like he's about to die in the film. I was mirin' his guns, though. Calum seemed ... dumb and not as serious/committed as I thought he might be. He's clearly trying to make some stuff happen for himself, but it made me question his prep and determination. Apparently, he wants to go pro, so that's interesting because if the IFBB & Arnold don't embrace and lock in on the Classic Physique category, he's going to need to do a LOT more work to compete with the big boys. He has the genetics--I don't question that.
Otherwise, I don't get why Iris backed away from competing in bb again. I felt that was a missed opportunity.
Other thoughts ... I thought Kai came across as himself, so that was interesting enough. He's going to be in the next season of "Stranger Things": I like that show.
pce