I brought o, general Air conditioner in 2006 I have done only 4 to 5 maintainance activity in a year after 10 year this AC working good cooling till date this is best ac as compare other and also low energy sufficient by Star rating only one disadvantage of this ac its very costly in price a common men disappear due to its cost but it pay your money in long time with interest through your no tension mind, cooling effect, low sound in this