While the detection features work well, the -hardware- (I use the term loosely) used to mount the contraption to your windshield is poorly designed. The design flaw is a failure to account for the earth's pesky gravity feature. The mechanism uses an L-shaped bracket. The lower end slips into the top of the detector and upper end has suction cups that attached to the windshield. The lower end depends upon an upward force (unobtainable by normal methods) to hold slits in the bracket against bars on the bottom of the housing. It would work much better if the bars were on the top, then gravity would be your friend. This results in the eventual inability to mount the damnable contraption. However, the electronics work very well.