Very efficient. Dual hoses for intake and exhaust make this unit superior to single hose units. Fairly quiet for a medium to large unit. Using it to cool the largest room, so central air doesn't have to work as hard. Also happens to be an open kitchen design, so this negates the excess heat from using the oven or cooking in the summer. Had to cut the largest window insert extension down with a jigsaw to make a perfect fit. The fact that its fairly substantial PVC might make hand sawing a little tough. Don't really need the remote control, but it is a nice bonus.