Being a Japanese brand quality is of supreme importance for Mitsubishi manufacturers. Newer models come with tropical inverter technology.
You make ask what inverter technology in the first place is. Well, to be really simple, inverter technology is analogous to the car accelerator. When the compressor needs more power, it gives it more power. When it needs less power, it gives less power. With this technology, the compressor is always on but draws less power or more power depending on the temperature of the incoming air and the level set in the thermostat. The speed and power of the compressor are adjusted appropriately.