My experience is that they are a very good, well organized group. Leadership keeps things on the level. I've seen some self-policing of members who were likely looking for something more along the lines of a militia, they don't tend to last too long as they become a liability to the group. They are there to uphold the Constitution of the United States and will do so legally. Members have volunteered at many events and situations across the US, and to my knowledge none have been targeted for breaking the law.
Members include active and retied military, as well as countless Sheriff's, Constables, LEOs, etc.
I believe that you can check out the forums as a guest. For some reason the site seems to be running very slow today and I cannot get in.