Sirius XM Marine Fish Mapping Weather

[Hookup1]

Checking to see if anyone has experience with the Sirius XM Marine Fish Mapping Weather - South Florida in particular. Plan is to install a Garmin GXM 54 before my Winter trip to the Keys. Looking for SST's, weed lines and hot spots. Is this service useful or just a waste of $99/month?

I have a possible deal on the GXM 54 antenna for $400. Free month with Sirius. $100 Sirius rebate after 2 months paid. No activation. So for $100 I can try the service for 3 months.

Feedback from The Hull Truth so far - it's junk!

 

[Hookup1]

So I got my deal done with Canyon Club and bought the Garmin GXM54. $849 list $675 from a few places got mine for $400.

 

[Hookup1]

Got the box home and the antenna puck in the GXM 54 box was a GMX 53. Returned the unit this morning. They did not have a GXM 54. Experiment canceled!