the unit install very easily . the 12v connector work very well and do not disconnect . both the gp unit and the pda be power from the 12v connection . the software load easily on the laptop and transfer to the ipaq with no problem . the map require a little forethought . however , loadie all of the state of Indiana still leave lot of room on a sd card for other thing . the system take about 90 seconds to acquire satellite and then route very well . have only use it for local route , but that be where I would need help most anyway . I already know how to use the interstate to get from one large metropolitan area to another -lrb- i.e. Chicago to Cleveland be relatively easy get on the interstate and stay on it -rrb- . sometimes it tell you about a exit just a little to close to the ramp . the voice prompt be very helpful .