I've been using this air conditioner for about a month. I Love it. It's quiet.  This 8,000 BTU unit works better than my 10,000 BTU window air conditioner did !  
My window a/c was Very heavy.  It was getting heavier and heavier each year to lift in and then to lift out. I'm only 68 so I don't understand why that is Lol.  This portable one will be a breeze to put away when summer is over.