I put this on a Stoeger 3000 12a along with a Tasco Red dot. I've only shot it at 25 yards so far with Federal 2 3/4" rifled slugs and it groups well. Longer range remains to be seen.
Pros: A lot cheaper than a rifled barrel
Cons: Haven't discovered any yet
This review was written in the old system and had content requirements that are different than reviews written today.