I've attended Christian churches all my life and at every one, the pastors always said that members of their congregation should not simply take their word on Biblical truth, but engage in personal study of scripture and test what they say against the Word. If your spiritual leader tells you that he/she holds all truth and knowledge and you can only know- and accept- what they choose to tell you, it's a fake faith and you need to get out.
So I think that covers most of my thoughts about Going Clear. It was a really interesting documentary and left me feeling a lot more informed about the history and beliefs of the church of scientology, not least because it sent me to the internet to do some more research on the topic. I found out nothing which led me to believe that the documentary was inaccurate, and a lot which confirmed its assertions. It seems to me that scientology is an unhealthy belief system run by shady and immoral people.