Wait till you start using it. I have three 12K btu units in my boat. They work well, but..... The thermostat operates in Celsius and will display in Fahrenheit. English translation, on some settings, I can have an 8 degree Fahrenheit temperature swing. One of my units needs a hard start capacitor. Will start fine on shore power, but the compressor starting load will trip the main breaker if the other AC unit is running.
Keeping my fingers crossed.
Ted