The moderator is a bot and your fellow commenters.  I think there is a human uber-moderator, but I highly doubt they get very involved.

Civil is clunky at times and I've had several innocuous messages blocked or the mysterious "your account will be locked, do you agree to be fair?".

IMHO, the most burdensome part is having to review 3-6 messages with every post.  All in all, it's better than the massive amounts of insane, caustic drivel you find on some boards.