I ordered Voltas and Blue star 1.5 ton- 5 star AC and I feel Bluestar is far superior in terms of performance, sound and cooling than voltas. Though the outdoor unit is quite big of Bluestar when compared to voltas but the cooling is very fast. After reading comments I thought there would be some extra sound coming from the unit but there is no such sound coming. Infact some sound comes from the plastic cover over wire in the outdoor unit but then fixing it properly removed that sound and then its very pleasant from outdoor and indoor unit. After running it for entire night i.e 6 hours at 25 to 26 C I found only 3 units hitting on my meter which includes other appliance like fridge running entire night. Must buy product.