this be a nice unit . I especially like the large screen size and the 20 gig hard drive . I have down-load many album onto the 10 gig set aside for mp3 music and use this feature constantly on trip . use the gp require some investment in time study the manual and experiment with the different trip option that be available until it become second nature . the unit come with user friendly and efficient mount hardware . on hot sunny day it be sometimes necessary to turn on the a\/c and set it to blow through the defroster vent to cool the unit . this be no problem though since the unit will tell you when it be get too hot . I have no regret about buy Lowrance .