I have te 120 model with the sidefinder. I love it. Picks up fish and depth very well. Still can't say I have it completely dialed in as I have caught a lot of perch right off the bottom that my finder didn't show me until I was reeling them in. I bring a milk crate along in my sled and clamp the finder to the crate to keep it in my hole or a second hole drilled right next to my fishing hole. The side finder works great and I use it a lot when drilling multiple holes to bounce around to and from. Tells you distances the fish are away from ya. I enjoy having it and especially for a reasonably priced finder for ice fishing.