I really like to use my punch cutter...but some cigars you have to use a DBG cutter. I don't have a v cutter or scissors, so I can't comment on those, but a single blade guillotine SUCKS! I have a couple that I keep around in case of emergencies, because I sometimes misplace the others, but if you are going to use a guillotine, it should to be a double blade in my opinion.

I have one nice DBG and a few punch cutters and they keep me happy.