Hitachi is the top brand which manufacture Air Conditioner.
Air Conditioner of Hitachi is best choice
I am using it from last year and no any problem faced till now
Hitachi is the Japany company and its ACs are worlwide
When I visit a bank branch I seen that there were all ACs of Hitachi no other brand I have seen it many places
I think if you are going to buy a new AC
You can check Hitachi also
My experience never faced any problem.
It does not make noise and gives cooling in seconds just on your AC and in some seconds it will give cool air it means work fast .