Bought this for our 250sq-foot office space in our converted garage space. The prior unit we had, (non-LG) worked fine but was inefficient. 
Even on the hottest days (inland San Diego gets quite hot in summers), this kept us plenty cool, and isn't nearly as expensive to run. Most of the time we've kept it on the "Energy Saver" mode. 
Installation wasn't too difficult, and the company videos were helpful.
I particularly like the remote control.