I have been a Humminbird user for the past 3 seasons. I know, without a doubt, that Humminbird Side Imaging has helped me put more fish in the boat....whether I'm fishing bass, crappies, walleyes, or big toothy critters like musky or pike.
For example, here's a nice Humminbird Down Image/2D sonar view from Table Rock, collected last summer. We used Side Imaging and Down Imaging to successfully target spotted bass, crappies, and even a random rainbow trout or two, suspended in the flooded treetops:
TO learn more about how we use Humminbird Side Imaging in our fishing applications, feel free to check out this library of instructional articles:
http://www.jasonhalfenoutdoors.com/HumminbirdIndex.html