I have it and don't use the image or the 3D stuff either, but it will provide good chartography both fishing and crusing and it includes lots of features not on the plotter itself. Color the chart depths the way you want, set safe depths and then the nav and guide-to features take you right where you want to go in safe water......shweet.
I say its worth it.
There was another thread not too long ago on this.
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