Summary: The other reviewer, Alesia, summed up my experiences to a tee (i.e., abysmal). All I will add is that it does not cool worth a darn. I live in Vancouver, BC - not exactly the AZ desert, and it couldn't cool a small with the outside temperature at 85 F if its life depended on it. And it did..
Summary: We got this unit used from friends who bought it when their main A/C quit in the heat of summer (near Livermore, CA). We got it for use at our modest cabin in the Sierra Nevada near Arnold, CA last year, and it has performed flawlessly. Installation went easily and well, but presented a problem.
Summary: I was so excited to get this unit, we needed it to cool a regular sized bedroom (10x12) on hot days because the windows weren't shaped for a window unit. The cost was steep but we bit the bullet thinking it would be worth it to sleep in a cool room in the summer. We were so wrong.
Summary: I bought this product about 3 years ago brand new and have used it for about 2 weeks every year since then. It is not at all effective in cooling any room. I've used it on a room that's maybe 500 sq ft max. After running for about 2 hours, it manages to cool the room temp from 90(f) to about 84(f).
Summary: What a piece of garbage. This is less an air conditioner, and more of a movie prop of what an air conditioner would look like. In fact, I would not dignify it by calling it an air conditioner -- just a Thing. Our contractor bought us these Things. I had a feeling he was angry at us, but now I know.
Summary: Look, I'm not going to go ahead and say that this is the BEST portable A/C unit on the planet... But I will say it's pretty good for the price. It does a pretty good job of cooling a medium sized room and greatly aids personal comfort.