I bought this air cooler 3 years ago on a Diwali sale for Rs 5000/-. I was a little apprehensive as I had used an air cooler before which was not at all effective. Trying to be Eco-friendly, stay cool and a little coaxing of the sales staff convinced me that I was making the right choice.
This is by far the best air cooler I have used. It has made the Hyderabad heat livable. Yes it is a bit bit noisy but I do not really mind the noise considering the heat it beats. Additionally since the water tank capacity is 50 liters it almost lasts me 3 nights without a refill.
I would definitely recommend you buying this provided you live in a dry hot place and do not mind a noise of this cooler.