Review (4/5): The vacuum isn't a gimmick!
I thought the vacuum feature on beard trimmers was a gimmick, but I figured I should give it a try. Turns out I was wrong. This thing actually works really well. My girlfriend is happy that there isn't hair all over the place anymore, and I'm happy that I don't have to clean up (and apparently leave a lot behind, as my girlfriend likes to point out) hair scattered around the bathroom.
The other reviews are right about the turbo mode, though. It is both necessary to catch most of the hair and very loud.