Man, this detector rocks on Ka band! Today, while I was driving to school (college), I was getting off of I-25 and was on the off ramp turning right when my new (only a couple of months old) X50 started chirping to alert to Ka-Band. I proceeded to look around and didn't see any law enforcement officers around so I was thinking to myself "where in the **** is this guy at?" Well, turns out that the Colorado State trooper was indeed over the hill running instant on due to the fact that it was a posted 35 MPH construction zone (unbeknownst to me of course). I was extremely impressed with this detector's ability to sniff out Ka-band especially when compared to my ancient Escort 4600. Again, I'll have to say that this thing kicks a**! If the Redline is indeed any better than the X50 then Escort will truly have a winner!