I have a Hummingbird mega 9 si on the bow,got it rigged up with the daducer and really like it.When I decided to upgrade from my old 2d grayscale unit,at first I was just going to go with a slightly bigger color 2d with mapping.After listening to what the folks on here suggested I decided to get the unit with the imaging and I'm very glad I did,I have no doubt it improved my catch rate.