The only negative comments that I have about my Elite5 DSI is the fact the screen is a little smaller than I like and the owners manuals are useless. You'll spend alot of time messing with it on the water than fishing in the beginning. Once you get it figured out though I think you'll enjoy it. Works great at top speeds. I run mine split screen 455/800 pretty much all the time. Don't know why but I seem to get a better understanding of what's actually under the boat this way. I have the Navionics card in mine and the maps are great. Matter of fact I just got a prompt to upgrade my desktop maps this morning. I use the desktop maps alot when sitting here at the house. Studying the maps on the computer then inputting the waypoints is pretty much how I fish. What looks good on the map may not always be a good place to fish. I mark it, scout it out a bit if it's a good place then I save it forever.