I'm not so hot on POP. On my normal 1000 mile trip over the weekend I had 5 false POP's and 0 real ones. I was really disappointed with the X50. I've only had it 3 weeks and This was my second trip with it. I'm out in the middle of nowhere and getting false X's with nothing visible anywhere. No hiding spots either. The same happened with a POP false. I'm tempted to go back to my old cheap Whistlers as I've never been ticketed using them and I get a lot less falses with them.