yeah it actually works well, it cools and heats my room quickly to whatever i set it to. My friend who told me about them said he has bought 18 of them with no problems. My only problem with it was initially i had someone who claimed to know what their doing set it up, and he didn't turn on the valves, so he blew my compressor right off the bat. Needless to say i had to call an hvac guy and then battle it out with ramsond to get a replacement outdoor unit, which i had to pay the shipping on or i would have never got it. Since they were being unresponsive i called my bank and told them the problem, they refunded my money immediately, i than called ramsond and told them they can either replace my unit or take it up with my bank. Needless to say i got a new outdoor unit, and it has been working awesome. It comes pre-charged too. Just don't expect great customer service or anything. But, they unit works well so far.