I have been using this product for 2 years and it is working perfectly I have not used other brands AC but I can say that lg will not make to regret your decision. so you can go for this air condition without worry I have LG1.5 ton 3 star AC and its is more than enough for my11*13 size is best size room my roomdoes not have open roof exposed to sun and no walls too. I set the temperature at 25-30 and it makes me to sleep comfortably and verry good air condition