this be the first time I have ever write a review on any product , I be use my third Garmin 3790 LMT as the first two blank out within two week and I have only have this last replacement unit for one week . this be a very unreliable product and I do not believe Garmin have the technology to actually produce this unit to function dependably ; the concept be fine other than the ad that pop up and the traffic warning that be never actuate . I believe Garmin have good product , but this be not one of they . I rate this as a do not buy ! Trust what other be say and avoid this gp .