Izzy I dont have that unit buy I have a 332c, it is a good unit. To me there is only one down fall to lowrance and the maps. If you are considering purchasing the seprate lake maps which go for 100-200. They come on a mmc card that you slide into the unit. Then that will display the map on the unit only. But if you purchase a garmin gps and then buy the maps 100 bucks. They come on a CD that is first installed on a computer then you dowload the maps to the gps. With the maps on the computer you can view, added waypoints, make routes for following channels. With the lowrance you have to buy a software goes for 150 to view the same stuff on your computer. But this is just my 2 cents worth. Good luck in what you do buy because a gps is well worth the $$$.