Just ordered a new Cutter Cuban Crafters.

[shilala]

Originally Posted by kickerb

Also, to me it takes off too much of the cap. Does good with larger ring gauge cigars, but will butcher the small rig gauges.

There's a really good point that I missed. They aren't good for really small rings, the cut is too deep unless you hold the cigar back from the bottom. It'll take all the caps off and square the end.
I've never had a "bump" issue with the metal ones, but it stands to reason. Plastic probably can't stand up to the force required to cut very many cigars without giving way.