Excellently made guns with immense knock down power with 3” .410 000 buck loads. Very near to being hit with five 9mms all at once. So, multiply that by two rounds, and you have essentially the same firepower as a Glock 26 that can be unleashed as fast as you can cock and pull the trigger twice (read: very fast with practice).
In short, they are devastating.
Two rounds may not sound like much, but in the vast majority of civilian self defense situations, where most often the gun doesn’t need to be even fired, it will be enough almost every time. Plus with the spread of the buckshot you increase the likelihood of getting rounds on target.
Granted, they are rather large and heavy, but they can conceal extremely well. Also, a better snake gun for deep woods use has yet to be made. Keep one barrel loaded for snake, and the other loaded with a .45 Colt LSWC for “bigger” threats such as a boar or leopard.