A friend of mine in Miami recently replaced his AC units with something other than Cruisair. I'm waiting for a call back from him, and will repost the info when he calls me back. Significant because it was half the price...and his new ACs work great! I'm also told that Cruiseair/Marine Air are not the quality products they once were.
Gulfstream Marine AC in West Palm/Riviera Beach is about the only game in town. Super Nice People. Excellent Work. They stand behind everything they do. BUT...their labor rate and pricing schedule goes way beyond reasonable in my opinion. I was especially displeased by their full labor rate charges for travel to the boat on top of the MAXIMUM retail price for every last little thing.
Yes, I do use Gulfstream. You will be totally pleased with everything they do...except the final bill.