If we talk about air condition there is lots of variety in market and no doubt voltas is a good option.
According to my experience it is value for money option to use voltas brand for ac.
My window ac 1.5 ton is cooling great with taking minimum time like 10 mins and provide us a perfect chilled room after sometime. But we also keep remembering about service of ac time to time because if you want an perfect output then you have to service perfectly on time.
It is less weighted to carry and also easy to installed.