I had a mixed experience. Long time ago, back then marine
AC was their main business, I installed three units, on two boats with good results. But when I installed one on my own boat 5 years later, the compressor
was very noisy and didn't cool as promissed (the temperature drop was not as advertised.) I took the unit back and they tested it in front of me there in the shop. The technician then told me that is the best I can expect and that I need bigger water
pump, although the ones supplied previously seemed to work fine with the other installations. Got bigger pump, water
shooting out the discharge like it was a bow thruster. They told me the noisy compressor
was becaus it was the superior piston compressor they use. It sort of worked. Five years later the compressor gone out completely. I took the unit back to King Air, they replaced almost all the parts
and charged me just little less than what I paid originally for the whole system. BUT. When I installed it, it ran quietly and worked like a champ for 6 more years, at which point I killed it through negligence myself. So the compressor had been defective from day one and they chose to BS me so they don't have to warranty it. Not happy with that kind of treatment.