From last 2 years we are using this A.C we did not find any kind of problem in this.The compressor of this ac is very strong it takes very less time to cool the room. the most important thing is very economic than other brand and services of voltas is very good with my experience. sometimes it sounds little noisy other wise its ok .i am satisfied with the voltas.
I think in AC wise voltas I will recommend you the best company .reliable and trusted .