Let's start off on the positive things to say. Firstly, it cools as it is supposed to, with very low maintenance needed even after a few years of usage. The cooling air is able to circulate my 550 square feet studio unit, without the need to turn on the ceiling fans. That to me is a plus side. Also, using R410A is the standard gas in most households, so it is easily manageable to find gas refill. However, as it claims to be Eco-King, it does not show on its star ratings. The electric bill can soar depending on the usage, and its not something I can turn on the whole night without thinking of its consequences.