Borrowed me mates nav man 320 when i went down to daventry and coventry last week, awesome all the way there! But when i got back up to bradford/leeds area, which i am very familiar with, it was tryin to send me completely the wrong way!! I heard on the radar detector front, that if it picks up a gun, it's too late anyway because they have allredy detected you?? Could be wrong, but thats what i was told!