Well today the Pro 78 let me down I decided to take it up against the world's best instant On radar users Sheffield Village. They are deadly with IO K band but now are LETHAL with 35.5gh Ka band. I will have the video up today. I will let you all be the judge. Please remember that I have used an X50, RX65, STI, V1, and the Pro 78 in Sheffield Village against IO K band and IO Ka band and they have ALL let me down before. I am not trying to make any excuses for Whistler but facts are facts.