Instruct: Classify Amazon reviews into positive or negative sentiment
Query: A solid performer but takes some practice and study.

This is a nice unit. I especially like the large screen size and the 20 gig hard drive. I have down-loaded many albums onto the 10 gigs set aside for mp3 music and use this feature constantly on trips. Using the gps requires some investment in time studying the manual and experimenting with the different trip options that are available until it becomes second nature. The unit comes with user friendly and efficient mounting hardware. On hot sunny days it is sometimes necessary to turn on the A/C and set it to blow through the defroster vents to cool the unit. This is no problem though since the unit will tell you when it is getting too hot. I have no regrets about buying Lowrance.