The performance of caseete AC of mitsubishi electric is fine and ok to go , but there service is pathetic. For electronic items like AC , you need to consider service as a major thing, because local AC technician cannot solve this company AC , as they are very different and complex , and their error codes, there internal motherboard is completely complex and you cannot get spares outside.
If you don't have near you for heavyduty
Then consider OGeneral cassette or Daikin casette.
Mitsubishi electric split AC is not good again, my above view is for casette AC only