This is one time when I have to disagree with Bot.  I put a TKat on my bike and noticed the difference immediately.  On the freeway, the turbulence behind trucks was greatly reduced.  I also noticed a reduction in chattering over rough road surface.  I would not ride without one.

I realize that I weigh twice what Bot does, and that influences the way the bike handles, but for my money, I will take the fork brace, and the TKat is a good one.

I've had both.
Performance is the same.
After reading Twist of the Wrist II a few times I'm getting through the same corners with a more consistent and higher exit speed, using less lean angle, not dragging pegs, well , once in a while, but not even almost like before.

Go to 12.5" shocks ,they decrease steering angle,  increase rear wheel travel from 2  to 3 1/2 " (have progressive springs-and better handling) and you'll never drag the pegs again.I'd rather put my money into buying better tires for better handling ,(The stock tires are junk) than a fork brace .
  If you're following a semi and it's blowing you around , why fight it?Drop back or pass it ,use your brain it's the little things that count.