You should read The Heroin Diaries
Nikki Sixx kept diaries during the depths of his addiction, he was not having a good time during what the movie depicts as their zany adventures. Addiction turned his life into a horrific nightmare even at the height of their fame. He spent most of his nights huddled up in his closet holding a shotgun and suffering from crack cocaine induced psychosis.
You gotta read The Heroin Diaries by Nikki Sixx. Makes Slash look like an amateur (He's involved too, though).