I may be cheap, but I wish that if a choke tube didn't work in your gun that you could return it.
I've shot a patternmaster choke tube for a long time. I even have one of their prototypes, where the wad strippers were made from 4 small allen screws.
Like what was said before, every shotgun is different, so the only way to really tell how well a choke tube works for a given gun is to pattern it at the distance that you will be shooting with the exact same shell and shot size.
The patternmaster works very well in my 12ga Model 12 that has a .800" bore barrel, but I couldn't get it to work to my liking in my Citori O/U 12 ga. The load that patterned the best in my Citori didn't work in the Model 12 either. That gun, for whatever reason, patterned 1 1/4 oz. loads better than any other recipe that I tried. The Citori worked the best with 1 3/8 oz. loads.