Read tons of reviews on thus LG LP1419IVSM. I was looking forward to a QUIET portable energy efficient air conditioner. This model delivers. The sleep mode is my favorite, built in timer which incrementally decreases (increases?) temperature so your room won't turn into a freezer when you sleep. Second most favorite feature is the LG thinkQ app where you can turn on / off the air conditioner remotely, switch modes, and MONITOR ENERGY CONSUMPTION. This unit sips energy. 

Purchased a LG LP0821GSSM and will review that device later.