Must say that I was pretty disappointed. I had an original Escort 8500 for the past 6 years (the wife still has a 4600 in her car), so that's what I'm used to. We traveled ~380 miles in a company Dodge Caravan and the STI was running the whole time. We passed about a dozen LEOs that I saw, and not a peep from any of them on the STI. Two of them had vehicles pulled over. Were they all shooting 33.8, or did none of them have radar on, were all shooting IO that the STI didn't catch? Don't know, unfortunately. Passed one 'your speed is' camera and got about a .1 mile warning around a curve.
What the STI really seemed to like was falsing X on the open road. About 20 minutes after we got started, the STI started showing a X band hit of 10.576. This went on for miles. Nothing could be seen behind us, nothing in front of us. I powered the detector down and tried again. As soon as it started up again it was right back at it. Finally after nearly 15 miles this stops. Then an hour or so later, it started beeping 10.576 eight times about every 45 seconds. This too went on for about 15 miles. I was running in auto mode, but had to put it in City No X on the highway to shut it up. Again, there was nothing visible behind us or in front of us.
Anyway, I was still in my 30 day test drive so I just called to get an RMA number to send the unit back. It was shipped before the 33.8 fix. I really want the STI to work because I like the idea of a totally stealth detector. I'm gonna try a few other detectors over the coming months and make a decision.