It hasn't started yet, but it says "coming soon." I'm REALLY considering doing it, but I've heard mixed reviews. It seems like most people either loved it or hated it. I have plenty of time, especially in the summer to train so I'm not as worried about falling behind as some people are. I have read that you'll start off behind if you haven't done crate games, but I've also had people say they don't like crate games and they skip it and do fine.
I'll probably end up doing it. Hugo naturally sticks close and has a good recall, but he has a pretty high prey drive, and really wants to greet other dogs. When we're off-leash I have to call him off of stuff kind of a lot.