I bought this air conditioner of tata and have found that its cooling effect is quite nice and quick. I bought in 2012 and till now it has been used by me without any technical problem and glitch. although it requires yearly servicing of rs400 but this can taken for granted as servicing is required in nearly all electrical heavy appliances.
The services of tata voltas is not that good and they do not provide any technical assistance like some other firms do. my room in which it is installed is of 10foot* 10 foot and the cooling it provides is nice. although its not that quick but it takes time a reasonable amount of time to cool the whole room. but one thing I would like to mention here is that it once it runs for a duration of 4 hours you will get chilling effect in your room and you will need a blanket or a sheet to cover yourself so as to get yourself protected from that of chilled air.
The operational skilled required for this ac is no. its very simple in use and you can easily operate it. the installation is not provided by the tata and probably that is the most annoying part of the tata services, it is supposed to do so as it is probably the most reputed business family of the country. I chose this brand over the others because of the reason that its window ac are quite cheaper than others or we can say that they are quite reasonably priced whereas the others are highly priced. I would like to recommend this ac to all those who have a limited budget and have quite small rooms.