Ibrought blue star 1.5 ton 5 star split AC4 months ago . its has given very unsatisfactory results . in these 4 months I have changed its gas 5 times in 5hrs use each day and for changing I i have to call its staff min. 10 times to replace its gas. cooling is low compared to my previous ac throgh II had to pay more for it . The ac makes stange zrrrrr sound sometimes for which I complaines in the customer support and they said they will look it but has become a month and there is no trace from them about it . design is good but it has failed to satisfy me .i will sell it soon and buy another one but not from blue star.I throught bluestar was a trustworthly company but with this ac .