This gives you additional magazine capacity and reduces the time until you run out of shells in the gun, but it adds length and weight to the gun far from the balance point. They do eventually wear out and start dropping shells — a big reason why the shotgun cognoscenti of the ’90s preferred to carry their shells brass-up to prevent losing them under recoil. All in all, I find that a quality magazine tube extension, sidesaddle, and perhaps a MatchSaverz as well strikes a good balance between carrying enough bang and overloading the gun to the point that it becomes unwieldy.