I'm happy with my helix 9. It is the mega scan with down and side imaging which I use for multie species and lakes and rivers. I believe last poster is kinda correct about it being useful for salmon on lake o, but early in the season (even now) there are salmon ,browns ,Lakers shallow. May be useful late in the season as well when fish are in closer staging. My helix can do more than I'm capable of unless my kids help me. But big screen is nice. Might be some sales this weekend Sent from my SAMSUNG-SM-J327A using Lake Ontario United mobile app