I got one of these units about six months ago and love it. Took me a while to get the settings right where I could see structure and cover. I've marked new brush piles that I was not able to see before and marked my own made out of PVC. Alot of people said you cannot see PVC with sonar but I could see them pretty good with the dsi. Still learning new things on it everytime I go out and this thread has been real informative. Thanks.