I also owned a Judge, my impression was it was a fun gun to shoot and could be a decent vermin gun around the farm/hunting shack, that is the purpose I got mine.
That being said, most of the ammo used in these guns are the plain ol 410 buckshot/birdshot that is no good.
You buy the handgun plated buckshot and its a completely different animal, penetration is very good at 15-20 yards, half the time the wad would go through my plywood at 15. If its not plated it will flatten and be worthless. Also the handgun ammo is cheaper most of the time.
The winchester stuff is pretty good as well, didnt shoot too much but enough to keep the pigeon population down.
The 4 shot ammo is OK, again patterns opened up at longer distance but under 10yds youd be fine.
the 45 colt, well it is what it is, at defensive ranges, no issues.
as far as slugs go, in mine they were VERY VERY accurate.
I ended up trading mine for something id use more, I liked it just fine but didnt need it as much as whatever I thought i needed at the time lol.
Basically most folks that badmouth them, have not shot them enough to see what they are capable of, you they havent shot them at all. Are they my first choice in PD, nope, but i wouldnt feel undergunned with one.
Good luck