I have been using the Voltas 1.5 ton Vertis Platina window AC for 6 years. And there is no problem in this product. Everything about this AC is amazing. Even after so many years, there is no reduction in its cooling. It still is a very powerful AC, much better than the spilt AC of many brands. There has not been a single issue with this product in the past 6 years. It is the best product if you want to purchase a window AC.