Every air con is good... Just that no one cares about the material use.
I install my mit system 4, I wanted swg21 pipe, and they actually go and buy for me. Very seldom customer ask for it. I told them r32 needed min, swg21 pipe. They said swg22 enough... Ok noted... I am willing to pay more.
I want amaflex class 0, thick 1 inch rubber feets for the compressor to reduce vibration as many just place it on the floor. The vibration will reduce compressor life.
Wrap aluminium tape for outdoor insulation that is expose to sun. A aluminium cover for my outdoor compressor.