After searching internet and concerning friends I bought two mitsubishi split AC.They are costly than other products in the same category but after using them I conclude that they are value for money.cooling is superb and sound is also very low. I dont think that any product in the same category is as good as mitsubishi Ac.they have 5 star rating for saving electricity.
After using for nearly 2 months, I came to know that my electricity bill also decreases after installing mitsubishi Ac.initialy cost will look huge but it will repay you in the long run.