V-cut cutter?

Is anyone using the V-Cut cutters and if so, how do you like them. I have tried different cutters but haave not found one I like so I use a punch. In fact, I make the punches out of shell cases. I use a nickel plated .270 or .30 cal case for most and a .40 or .45 cal for some of the larger cigars. For small cigars I use a .223 or even a .17 HMR case. I use a Exacto Knife to sharpen the edge by beveling the inside edge until the case rim is sharp. These work great and are good conversastion pieces. But, I would still like a cutter and teh V-Cut cutters look interesting. Any thoughts?