I don't know what the deal is, but my RX65 works awesome somedays and sh$tty the next. Ie; I have had a 2.5 mile warning on a hilly road when the LEO had a guy pulled over facing my vehicle, then other days I have seen the LEO 4 secs before my RD goes off. On that particular instance I know that the LEO was not using instant on radar either. My RD alerted KA slowly then ramped up quickly. I just don't understand why the ramp up does not work properly. You can have the LEO in plain site and you will only get a maximum alert of 4/9. Does anyone have some useful information about what the deal is? I was also wondering if the new M4 antenna has fixed this ramp up problem.