I live in Ontario, Canada. I've had an STi Driver since last summer. Ka performance on the STi is simply awesome. K band, I don't like at all. The OPP use exclusively K band on the 400 series highways. Too many close calls with lack of detection from the STi driver. Situational awareness is what really helps me out. I love the STi on Ka, but the Redline is more for me with the amount of highway driving I do. Local LEO's use a combination of K and Ka, so it's a crapshoot of what I end up getting tagged with. I've noticed it's mostly K with locals though. I've got the STi sold to a buddy. Ordered the Redline this afternoon. Can't wait to get going with it!