The LG LW1211ER is discontinued and replaced by the very similar LG LW1212ER (*Est. $320), which we also review.
We found positive reviews for the LW1211ER and its 2010 model, the LW1210ER, for a large space of about 550 square feet. It performs very well in professional testing, and no owners complain about this unit's ability to cool efficiently. Comments such as "performs beautifully" are common. Most users find this LG air conditioner to be fairly quiet, although one says it's a little loud on the highest setting.
A considerable number of owners find installation to be difficult even with the included slide-out chassis, and many complain of unclear instructions. Like most air conditioners this size, this unit features an electronic display, remote control, automatic restart after a power outage and a programmable timer. A unanimous agreement between experts and owners about a model's cooling ability is rare indeed, and the LG LW1211ER has it.
ConsumerReports.org tests about 40 window-mounted air conditioners and gives them overall scores based on their ability to cool the advertised space while staying energy-efficient and keeping noise levels low. These units are also rated on factors such as brownout performance, ease of use and airflow direction. The LG LW1211ER is included in this testing.
Review: Air Conditioners Ratings, Editors of ConsumerReports.org
Out of the dozen or so user reviews on this site, most give the LG LW1211ER 5 out of 5 stars. Several owners are satisfied with how well the unit cools, and one raves about its low price and extreme quietness.
Review: LG Electronics 12,000-BTU Window Air Conditioner with Remote, Contributors to HomeDepot.com, As of April 2012
A handful of owners give the LG LW1211ER 4 or 5 stars out of 5. The most detailed review rates the air conditioner highly for performance but deducts slightly for a difficult installation.
Review: LG Energy Star 12,000-BTU Window Air Conditioner with Remote, Contributors to Amazon.com, As of April 2012
Buzzillions.com is an excellent source of reviews for discontinued models such as the LG LW1211ER's predecessor, the LW1210ER, which earns 4.7 stars out of 5 from about 10 users. Nearly identical to the LW1211ER, the 2010 model receives high praise for its cooling efficiency but many complaints about how difficult it is to install.
Review: LG 12,000-BTU Window Air Conditioner with Remote, Contributors to Buzzillions.com, As of April 2012