We have been using Voltas window Ac from last 2 years. It is available in the range in which a common man will not hesitate to spend that much money as the other ACs like O General, Daikin, Carrier, Samsung, LG etc. are in high ranges.
We have bought this AC as it was our first AC and it is the cheapest among the reliable brands. It is a 3 star Ac having a very good cooling effect which can make you comfortable in minutes, how warm the temperature may be.
But the main thing I do not like in this Ac is that it is continuously making a whooshing sound everytime which is very irritating to me.
The other things I dislike are, sometimes the compressor takes a whole lot of time to start which is very annoying and also it does not have extra features like auto sleep, turbo mode, mosquito repellent etc.(may be the company will provide them in the upcoming versions).
There are better options available than this Ac. You should not buy Voltas and try to spend some more bucks and get a better AC like LG or Carrier. having more featues, more reliable and also you have to spend less money for after sales services.