I've put about 1000 rounds through mine so far and really enjoy them. Hopefully I don't run into the problems other people have with the detents dropping paint.
One thing I noticed with the follower when you're trying to lock it in place you should try to keep the follower release in the "up" position. Just hold it in place while you put the rod in and it'll catch easier. When I first used them I didn't do that and I jammed/tangled a few of the springs. Then I finally read the manual/insert and it actually says to hold it up while using the rod