this be my second attempt at a `` gp design specifically for Truck Drivers . '' the first be a teletype worldnav 720060 which also fail miserably for the price you pay . I digress , the device and accessory require for operation seem to be make with decent quality . consider it be make by pc miler I would expect this to be A.J. square away . this be a poor asumption on my part . as far as route be concern it be a disaster . I previously use co-pilot Truck on my laptop and it route pretty descent . I figure this unit would be the same but that also turn out to be another poor assumption . the device much like the teletype warn you be on restricted route when you be not and every exit ramp you pass it display a pous icon indicate that Truck service be near when they be not . a lot of the pous 's display on the map cease to exist at all . any truck gp that instruct you to make a u-turn when there be clearly alternate truck friendly route available should be consider to be very unreliable in my personal opinion . I pay $ 255 for a refurbish unit and I must say , I be terribly dissapointed with this unit . the map be very slow to navigate . if you need to move it around to see you destination or verify the itinerary you will find it somewhat troublesome that in the year 2010 that a company would even put something like this out for sale . it be very sluggish . the same also apply to when you be enter a destination address , it lag almost 2 full seconds behind what you be do . there be several area that it completely give false information such as street name in relation to what town they be actually located in . very frustrating when try to plan a trip . I guess in closing , I would be happy if I could get my Omnitech GPS software to run in this ; otherwise , it will be put up for auction like the rest of the failure . the next try will be a Rand McNally Truck GPS which I have read very good thing about . but then again I do for this as well .