I will probably get a fishfinder with GPS this spring and was wondering if the DownScan Imaging by Lowrance is a useful feature, or is it just another gimmick to catch fishermen?
I am considering this unit as it looks good on paper and price (about $649), but could easily go with any of the other models or manufacturers.
http://www.lowrance.com/Products/Marine/Mark-Elite-Series/Elite-5-DSI/