Your right about the lidar, radar detectors arent effective against them due to the fact they are only on when the officer pulls the trigger.
But your wrong about the multanova. Its not "triggered" when a car goes past it, its constantly left on and constantly emmiting a signal. It emits its signal in all directions, but its only the signal directly infront of the gun that gets reflected back to get your speed. Thats why detectors give you prior warning because it picks up the signal that has bounced and reflected down the road. Check out howstuffworks if you want to know the specifics, they have a good article on rds.
But yeah I got a X50 from this mob a little while back, and im pretty happy with it. The range it gives does vary, but I have seen it give 20+ seconds warning at its best. I can't drive without it now. I had an RX65 before till someone broke in and stole it. NEVER leave your suction cups on the windscreen!! I learnt the hard way=( But yeah it is definately noticably better than the RX65. The RX65 probly could give the same range at its best, but I found it was just less reliable. The Rx65 on the odd occasion would only alert me as Id basically pass the camera, but the X50 has never given me less than about 7 seconds at its worst. Generally its about 10-15 seconds. But even 7 seconds is enough to save you if you aren't being ridiculous. Plus they say the multis range is only 40m and 7 seconds at 70kmh is 135m.
As for false alerts, they do occour on the X and K band, but you just turn the X band off cause its not used here... but there are no false alerts on the Ka band. So if they are pissing you off then you can just turn off K and X band for city driving and leave Ka on just for multanovas. I personally just put up with a few false alerts on the K band for the chance to be saved from a cop car.. plus I just like to be reminded that its still working=)
