Well guys before I write this make sure you know that I was operating both detectors on simultaneously so take the results for what they are worth. While heading to work today I had to CO KA 34.7 encounters and on BOTH encounters the Pro 78 alerted at the same time as my STI. The road was straight with no curves or hills but had HEAVY traffic. I received about .25 of a mile warning on the 1st and about .75 on the second encounter. Both encounters were on the same road on my way to work one right after the other. I must say that once again I am impressed.