This unit definitely cools my room but there is a significant difference in the temperature I'm inputting is as low as it can go and the small room I have it in is 70F from what my thermostat stays with a fluctuation throughout the day. I have it running 24/7 because my room in Vegas is HOT since the airflow from the vents in the house isn't great. I'm guessing this is the reason for the temperature fluctuation. My biggest issue other than that is it is LOUD! When it kicks on in the middle of the night it sounds like someone is stomping around the house. It always leads to my dogs losing their minds in the middle of the night and on high alert. The only solution I've found was using a stuffed animal I picked up at the dollar store to slightly lift the unit off the ground on one corner. It stops the rattling to an extent. It is still very loud and every day it just gets worse. I've owned this unit for about 2 years now and its honestly always been an issue but I saw other reviews say the same thing. Since it's getting progressively worse I'm looking into buying a different model/brand. I have an LG in a different room as an oh crud! back up for the dog's room in case the power goes out in the house while I'm at work and the AC is soooo much quieter even though it was less than half the price of this one!

We live in a fairly remote part of Arizona. Our power has gone out for as long as 2 days this past summer and 4 other times for just over 12 hours when temperatures were over 110. We bought this to keep us comfortable when the power goes out again. We have tested it in a 400 square foot room when it was 118 outside and it managed to keep that room at 82 degrees which is the temperature we keep our house during the summer months. This is going to keep us from having to stay at a hotel next year with our 2 dogs.

I purchased two of these Whynter units for my home in the San Francisco Bay Area, where it's rather uncommon to have central air in an older house. I also have two of the TP-Link Smart Outlets monitoring the power utilization of these, and based on my tier of $0.39/Kw, they cost about $50-$70 per unit per month to operate. Well worth it with the following adjustments. Although it's fairly well known that these units are not as efficient or affective as their window-mount counterparts, they seem to get the job done, with a few DIY tweaks:

(1) Make your own window mount!!!

The window mounts that these units come with have two major issues: (1) the intake and exhaust vents are too close together, meaning that the intake will tend to suck in some of the hot air that the exhaust is pushing out, making the AC's job that much more difficult. When you build your own window mount, you have the option of spreading these ducts out, and thus alleviating this issue. (2) the mount is very flimsy and not at all insulated, meaning you're likely to have some hot air from outside seeping in around your mount. This is especially true if you opt not to use the intake hose, because you will be pulling a vacuum on your room (air being pushed out, but not replaced with external air, meaning your room has a low pressure zone) which in turn pulls hot air in from the outside and makes it quite difficult to cool a room. Long story short, use both the intake and exhaust hoses!!! I've posted a picture of the mount I made from a sheet of sanded plywood ($14 at Home Depot), using a jigsaw (Black & Decker, $25 on amazon), and some MD 2097 weather stripping to get a good seal ($3 on amazon). This mount made a MASSIVE difference in my ability to cool the room, and came with the added benefit of blocking out light (we have shutters that had to stay all the way open for the hoses to be in place). I'm still needing to build another window mount for my second unit, but I've attached photos showing the improvement.

(2) Heat wrap your exhaust hose!

The exhaust hose on these units gets super warm when the AC unit is in operation. That heat escapes back into the room you're trying to cool, having pretty significant effects. I purchased the Reflectix DW1202504 Spiral Duct Wrap ($21 on amazon) and it was enough to do two exhaust hoses (1 for each of my AC units). There's no need to wrap your intake hose. It took a bit of work to get this wrap cut to size, especially for the curved areas (I am nowhere near a clothing manufacturer), but through some trial and error I found that a S curve in the middle of the sheet allowed the wrap to fit snug around corners. I've attached a photo of the finished product for the exhaust hose.
Reflectix DW1202504 Spiral Duct WrapM-D Building Products 2097 Low Density Foam Tape, 3/8-by-1/2-Inch-by-17 Feet, GrayBlack & Decker BDEJS300C Jig Saw, 4.5-Amp

I am renting space for my shop and the office gets hot, this unit cools it down. I built a 12 inch tall pedestal for it and painted it black to sit it on so I could run a hose for the condensate water to a small pail underneath that cant be seen unless your on your knees. The hoses I ran through into the wall vis a grate that was already there on both sides. I took the office side off and replaced it with a thin piece of wood that I mounted the hose connectors to and screwed t right back to the wall. The amount heat running out into the shop is not very noticeable and I have a floor fan running anyway so it is not a problem. I am trying to get use to the timer because it will not shut off when the room gets cool, the fan still runs. I turn it off and set the timer to come on an hour before I arrive and that's enough time to knock the heat down enough to get started.

Living in New England we do have some hot humid summer months - I bought this for the upper floor (2 small bedrooms) of my Cape. But it is a large unit, so I moved it to the main floor and it easily cools the whole first floor of my house! Love the dual exhaust for efficiency. I did wrap flexible insulation around the exhaust hose, as it does get hot and didn't want the excess heat coming back in the room! It is a large unit, but very quiet and efficient. I've had it less that a week and have already recommended this model to friends!