These are my first mixed skins and I'm impressed. For the money I freaking well should be impressed, but these really are worth the extra few bucks if you can afford it.
I trimmed mine with a sliding G3 tool that I like much better than the letter opener style so I can't comment on the one that's included, other than I like G3's better. It looks identical to BD's, which I hate using.
One of the first things I noticed: these things are sticky! Holy crap! With age and abuse this has tempered a little, but ...