Looks like there aren't enough negative mentions yet.
We bought this unit as a replacement for a slightly larger unit that stopped cooling after about 8 years. Item shipped timely and arrived in only a couple of days. Box was slightly torn and smashed but unit was fine. Installed in existing hole with only minor modification as this one, as mentioned before, is smaller than the previous one. Once plugged in and turned on, it ran quietly and cooled 500sf cabin well. Haven't used the heater yet as this is July in Texas but overall I am satisfied with the unit, the price and ordering process from Best Buy.
I would recommend this to a friend