Have 2 friends with the 16K Ocean Breeze units.
One on an old trawler, the a/c unit is about 6 years old. No issues.
The other we just installed about 6 months ago. Easy to install, fit
in place of an older Marine Air unit. So far, so good.
The control box is either stainless or aluminum, don't remember which,
but at least it is not painted steel. No rust.
Very simple to wire, thermostat looks like a home unit thermostat. It
has a 4 wire thermostat like home units.