Hi my experience with the Symphony air cooler has been very good and its the best in price and durability.
I have a voltas air conditioner in our hall and a symphony air cooler in our bedroom and it does the job of cooling the air.
Air conditioners are very expensive with repect to their price, maintenance and its installation, electricity bill.
So to cut down cost we put a symphony air cooler in our bedroom which is about the size of a chair and doesnt occupy much space.
It cools down the room to a comfortable temperature where nobody sweats and gives a pleasant good night sleep.
It also very cheap in comparison to ac and just costs 3000rs and also saves you money on installation charges and electricity bill. I would recommend it.