Finally got my first test and save today with it. 2nd day of ownership. Driving to work this morning at 6AM on the HWY. It's dark... pitch blk. I'm cruising at say 84. I start picking up Ka and it's getting stronger... i'm slowing down... to say 73. I couldn't tell if he was parked or driving toward me.. but eventually the arrow went rear. and quiet. Plenty of warning and I like knowing which direction to keep an eye out for. Safe to say it saved me. I'm running X off, POP off, A, the rest factory. Glad I have my V1.