I am using voltas AC since 2 years its working in great condition till now and seems to be working good for some years more. Annually it needs maintenance to properly work and give efficient cooling without consuming so much of electricity. My ac is rated 4 stars so it is efficient enough to save sufficient electricity. My favorite thing in it is the automatic sensor which provide automatic cooling in the room.
When the temperature decreases to the desired amount it automatically gets switched off. I purchased this at price of 35000/- . I use it for my room only, it perfectly did its job very well since the time I am using.