The Beachtek is certainly a viable option
In my opinion, it's much more than that. Consider for a moment that your camera (FX-1, VX2100, etc.) has native XLR inputs. You're shooting a wedding ceremony that's just beginning. Your sound tests went fine and you set audio levels for groom and officiant accordingly. The officiant begins and guess what? He's clipping!
If you have native XLR, you need to quickly get to the volume control for left channel (for instance). This means punching buttons and turning dials that are built into your camera. Good chance you bump the camera and ruin a shot.
Now, same issue, but with a Beachtek. You gently turn the knob for left channel until the level is in the safe zone. Problem quickly solved without ruining a shot.
If you can't yell "CUT!" then you need quick, effective access to audio level control that does not ruin a shot and the Beachtek gives you this. I recommend the new model with separate LED level contorls.