Most of the time I don't use it as much as I should...... or could, or at least the way others do. I usually just glance around for active fish, and start casting. 2 times come to mind when I used it more like others do.
First time I was on a stumpy point, with a channel swing on one side. I picked out the stump with the biggest fish next, made a cast and caught a 6 pounder. This spooked the other fish, or at least they were gone after I caught and released the 6 pounder. I suspect just blindly casting would have resulted in a fish, but not necessarily the 6 pounder.
The other time I was fishing a deep channel swing near the dam. I had caught a couple decent spots on the ledge. I was ~50 feet from the bank on top of the ledge. I turned my transducer around and looked under a couple docks. There was a fish hugging a dock post ~5 feet from the bank in 4 feet of water. I skipped a jig under the dock right to the post it was at. That was my first 5 pounder of 2024.
I've been struggling some lately but I've always struggled when the water is under 55 or so. When Bass are hugging the bottom I have a hard time seeing them. (same with 2d sonar or down imaging). I think sometimes I should be casting and searching, instead of searching on a screen.
I believe people who are savy with electronics have the potential to find, and catch just as many bass with standard 2D sonar, down imaging, and side imaging. However, targeting the individual, bigger fish isn't going to happen without scoping.