While I certainly could not testify to shooting my new ported BPS slug gun "all day long," I could say that given the choice, I would rather shoot the my BPS set-up than my brothers .300 Win Mag any day of the week.
I wanted a dedicated slug gun and could not justify the expense of another shotgun with my Browning relegated to the gunsafe. I sold off some other equipment not being used to offset the expenses of the ported barrel. I am glad that I got it.
While certainly not something that you are going to want to shoot multiple groups in a t-shirt during the summer months, to shoot in fall to check zero prior to hunting season and in the field, it does what it said that it would do and does it very accurately.
Naturally an auto would be the best way to go for those that can but to those that are looking to use a pump, the ported Hasting barrels might be something to look at! (The noise was negligable, BTW)