So I got a really good deal on a brand new elite 4 hdi for only $150, and tried it out this past weekend. It worked wonderfully, I was worried about the screen size when split screening the chart/sonar, but I think it's perfect. I have a couple questions though, to those using this unit, first, how do you measure your total trip for that day (from when you turned it on to when you turned it off)? Also, can someone give me a quick rundown, or point out a link, that explains the benefits of downscan vs traditional sonar? I found myself using the traditional sonar, but might go to the downscan if it's more than just a gimmick. I know side-scan has a lot of benefits, but I'm not sure about downscan. Thanks for the help.