Never shift your seat again. If you are lucky enough to have a deck that can accomodate an umbrella that is 11 feet in diameter that is. The cantilever umbrella uses foot pedals to allow for control of the location of the umbrella to best provide shade from the sun. Rotating a full 360 degrees and with built in lighting this is something that can make sitting outside on the patio all day and all night very comfortable. On second thought, a pricetag of $900 makes having to shift your chair around sound not too bad.