The hitachi ac is not effective at all when there is even a slight change in temparature.
There is a market monoply of many brands in the world of air conditioners but hitachi is not one of them.
And they are not taking such effective step to get in demand as the ac is not that cooling you have to keep temperature at minimum to get the room cool. It is expensive fir the things and facilities it is offering. So I dont think you should go for it.