When I pioneered (especially during the first year and pioneer school) I thought I felt God's spirit more then any time in my life. I was 100% then. But, then my sister was disfellowshipped and it really messed with me that I couldn't have anything to do with her as a pioneer and 'an example'. I only lasted 2 years as one, got hauled into a meeting with the elders about hanging with her and it made me so angry that they didn't want me to associate with my own flesh and blood. First, I lost the pioneer 'status' (cause that's all it is) and then a few months later I was gone.
So, yea, for about one year, out of 23, I was 100% IMPRESSIVE
All the other years, something just didn't seem right. And if something bothered me I would just read more and 'convince' myself that my doubts would go away. That my doubts meant something was wrong with me, not the organization.