I think clear bra looks awful. I don't mind it on the bumper if it's installed in such a way that you can't see it, but half way up the hood and fenders. No thanks.
As for the K40, it's a POS (the laser jamming portion may not be bad, but the radar detection portion is AWFUL).
If you need something that's installed and provides laser jamming, go for a setup from Passport. If stealth style install is not neccessary then go for a V1 with the Passport Laser Jammer.