Is the Garmin Steady Cast a must have?

For the way I fish a heading sensor is a must have.

Because....?

I think it is a must have for offshore fishing so that you can tell how your boat is oriented with respect to structure.  It allows me to understand where to direct my casts.

I put the Lowrance equivalent (Point 1) on my kayak and found it worthwhile.  As mentioned above, helps with showing the kayak orientation on the head unit and in my case, also corrected the error with the FFS sonar cone, so the head unit actually shows where it is pointing on the display.  Not terribly necessary but appealed to my "I want it all to work and display correctly" inclinations.

Not necessarily a "must have" but if you find yourself looking at maps while fishing...its nice.

There are times when your sitting still...the map tends to rotate. Steady Cast will eliminate that.

It orients the boat on the map...the way it pointing.

For example...
Sometimes I will point the boat up stream on a river and drift with the current and use the trolling motor to slow the boat down.

Without Steady Cast...My unit would rotate 180 and think Im heading down river and the map would rotate also.