Look bro every AC nowadays in Pakistani market is just a disposable item you expect a life of 3 years from it beyond that its your luck. Everyone in the market will compare you an AC on the basis of cooling, electricity savings, size of indoor and outdoor and compressor type. Not a single brand identifies the thickness of copper sheet used in coils and evaporator and this is the most single common cause of failure of ACs leading to an expensive to fix leak. PCB is the second common culprit which usually arise from electricity fluctuation and totkas of AC servicemen while servicing the AC.
Gree and TCL 18000HEB or any T3 model of TCL have market impression of using reasonable gauge of copper, but again these are just words of mouth, mostly of the installers. No company info on it. Secondly, whereever you install the AC, try not to move it to some other place afterwards. Never ever get your AC serviced unless the unit desperately demands so. Clean outer unit yourself with water hose. Use pressure washer with aimed water jet and a water bag or wet vacuum cleaner to clean the inner.
That is how things have to be managed with destroyed purchasing power in Pakistan 
