this be my third Garmin GPS product . I have be satisfy with my other product . I purchase the 1450lmt primarily for the larger screen and the `` advance '' notice capability of upcome lane shifts\/major hwy\/freeway interchange . this , I think would be a big help for I as a return rver , drive a class A rig this time , as I try to navigate major interchange in cities\/areas I be unfamiliar with . to test the efficieny of the new GPS , we take it on a recent trip -lrb- auto -rrb- in the local area where we do know the interchange . the experience leave I with one wish , `` that the system provide longer lead time before warning of the upcome lane shift . '' one notice be .9 mile away and another be .6 mile . in some area and under some traffic condition , this be not sufficient to be able to manuever a 35 foot rig , or even some normal size vehicle safely . this be not a `` complaint '' , just a observation . I be otherwise fully satisfy with the unit . I will add a map recon to my plan to supplement the GPS timing prior to head into the war zone with the GBOY .