So I was heading out to a friend's place today going down a busy stretch of highway littered with K band speed signs. I pass the first 2 signs with no problem detecting them. The first was facing me and the second was forward facing off axis. The third however I think I caught a beep or 2 from it and thought nothing of it so I muted the alert since traffic was at a crawl. Soon I realized I was passing by the sign and no alert was shown on the 690se's screen. I thought it was pretty strange that it would completely miss a constant on signal like that especially since it would have plenty of cars to reflect off of. Now before everyone jumps on me saying my unit is busted. I just got it back from Mike B not too long ago and its in good working shape. This sign I passed several times before and always got crappy range even when approaching it head on.