I received my STi today and went hunting for radar. I first went to a known K band source which was a new CVS which has very noisy k band. I can detect it from a quarter mile away. My V1 definately outperforms my STi on k band. The V1 seems to be able to detect k band extremely well off axis from shopping centers. 35.5 KA was a completely different story. I found some LEO's that were running radar while talking. I did about 8 passes. The STi detected KA between .1 and .15 of a mile quicker. This may not seem like much, but in the city it seemed like a tremendous advantage. What suprised me the most is the STi continued to alert farther as I passed the LEO's. I thought the my V1 would be much better because of it's rear facing antenna.