I have the hds-7 and it's great. it will take you a little time to get use to it, then you will love it. if yours isn't running the 4.0 software. that would be the first thing to do. go to lowrance and update your unit to 4.0 then you will like it much better. you will find you get better arches in deeper water, in water under 10 feet,the arches turn to blobs. but if your in shallow water slowing down your ping speed will give better arches. try these settings. sensitivity--minus 7% colorline 72% range 50 ft frequency 200khz hope this helps.