The MOssberg, for the money is a good gun. I have one issue on this piece, and that is the safety is made of plastic. There are after market metal safties that will replace the plastic.
A couple of Authors, this forum, had experienced difficullties with pump action operation. Sticking not going smoothly, however, from what I understand they resolved these problems.
Presonnally I prefer the Rem 870, doesn't have the bells and whistles, shrouds etc, but it does have a follower that is hard to jam. When the Mossberg jams, with a round half out of the mag. tube, it is a bugger to free-up.