Having done this 4 times now, I tend to agree. It also works ALOT better on thin walled tubing. I popped a SLX tube to where you cannot almost tell it was there, but had less success on a Champion No.5 PG tube. I have also played around with putting a dummy wheel in a C-clamp-style pipe cutter which also seems to work well if you have a defined point on both ends of the dent. It magles the paint much worse though. Ultimately, you are going to need some brazing material or bondo to make it go away completely unless it is a seat tube.