Fact:
1) Used a system 3 Mitsubishi Heavy industries aircon for 10 years with only 1 minor break down where the aircon was not cold, but a normal service with gas top up brought it back to life. This is not mitsubishi electric that jack neo advertise so its cheaper.
2) Shifted and change to Daikin system 3 inverter, within 1 month, problem started to arise from water leakage to a damaged compressor. Problem carried on for a year, during this time we have not paid the company that installed for us(don't ask me how we did it), we insisted that if they want the money, make sure the aircon dont give us problem. But every month or two, we had to get them down to fix the aircon leakage problem. This drag on for a year and finally they had enough and told us to either pay for it or they will remove the aircon, we opt the latter as there is no point in paying for a rubbish aircon.
3) Called up the person that installed the MHI from 10 years ago and come over to our place to install another MHI inverter system 3. No problems so far and its much colder than the daikin one even when we set the same temp. Mitsubishi compressor pushes out air that is warmer compared that ****ty daikin and according to the foreman, the warmer it is, the better it is. This unit saves more energy too according to NEA.
Verdict: The brand of the aircon is important, the aftersales is important but the most important is the installation process which can only be done by a trusted company with the right team of installers. They were around $30-$50 more than the lowest quote i got, but at least they didnt bring their team of bangras/ah nehs to install compared with my daikin installer. Well worth the extra $50 for a stress free night. And by stress free night i mean not have to wake up in the middle of the night hearing drips and running around getting cloths, pail and a mop to wipe the mess up. Go stingy on your purchase and it will eventually bite you back.. been there done that. Good luck.