Well, I finished it last night. Some thoughts after seeing the whole movie:
Stay clear of it if you didn't like the Queen movie. At some times it's a bit comic book, a bit over the top and a movie and certainly no documentary. So if you are a fan and you want to see facts: Stay away from it.
If you just want to see a great, funny, and sometimes emotional movie, watch it! It starts a bit comic book, but after a while you see heroin being shot into arms, a dying kid, an overdose, a deadly car crash, et cetera. And the fun parts is naked runjing through hotels, Ozzy (great casted) snorting pee and ants, a lot of sex.
I know I had some nerd posts about the instruments, but the movie is just nice but again, don't expect a historical correct document. I think the Crüe guys must have laughed their pants of watching it.