I've used the K40 for many years too, and like it a lot.
On the open road I get warnings easliy from 2-3 miles away, around the city it doesn't go off all the damn time like my friends' cheap ass Cobra crap and still spots everything. (Never had a ticket (knock on wood)
$100 less that the $400 they want for a Valentine One too..
Total Immunity From Speeding Tickets K40 Electronics will pay any or all radar or laser speeding tickets you get for one year after purchase.