SI definitely makes it easy to know where there are no fish. Once you find them though, the tricky part is determining what TYPE of fish you're seeing on the graph. It can be tough with SI to tell if you're looking at white bass, bluegill, bass, or crappie.
I'm better at identifying fish using DI. I can tell the difference between crappie and white bass pretty easily with DI (not all of the time but a lot). SI is trickier because you're seeing it from the side and it can be hard to tell. That's what happened to me on Friday. I'd move around til I marked fish...but then I had to drop lines to find out what they were. It took a while before what I saw on the screen turned into crappie on my hook.

