We have had Starlink on our boat for two years. Our experience is mostly coasta cruising and an annual trip to Bahama in the spring and Canada every other year.
Last year Starlink did not work in the Bahamas. With the new agreement with BTC it works fine. Once away from cell coverage it decides that we are on the ocean and requests the marine option. We did not select the option and once we were near the Florida coast it began working again. Offshore from Little River SC to Morehead City it cut out again only the return to operating when near to shore.
Last year we went to Halifax NS. The only dead zone was in the Gulf of Maine. Again returning to cell coverage it returned to operation.
We believe that if you are in North America that if you have cellular coverage the Roaming plan works fine. As with everything else things may change but for now this works great. Speeds up to and over
200mb/s most times and at least 75-125 all the time.
Also our dishy is mounted inside on of our domes on the arch.
The only issue came when watching DirecTV. In the Bahamas the Starlink interferes with the DTV. DTV is receive only and Starlink transmits. It would have to be disabled to use DTV. With the DTV content now being mostly commercials and crappy news the only thing we find DTV good for is DYI, Below Deck and Jeopardy!