Oh, where to start with this...
Perry's story is heartbreaking and worrying. It was probably incredibly hard for him to write and read this (for the audio version) and share some very private situations with the whole world. Unfortunately, the squeaky-clean image of Chandler Bing is nothing like Matthew Perry's real life. 
All that aside, I did not enjoy this. The timeline was fuzzy and confusing. Additionally, I don't think he is entirely in the right place or mind to already be writing this. It is so soon after his "recovery." It makes me wonder how much of this was written just for the sake of money. He comes off as very rough and privileged as well. Comes from a well-off family that had every opportunity given to him, and he complains often. He has the ability to recover in the top drug recovery units, something that most won't ever get to do, and he takes it for granted. He often namedrops and drags a few famous people's names through the mud. 
I wish him well in his lifelong recovery and I hope I never see a headline that he has turned back to drugs/alcohol or has passed from his addiction.