i ordered this for a co-worker who has a medical problem with dry eyes that was affecting her ability to work at the computer. She LOVES this! It not only cools off her cubicle, but it moistens the air so it is helping her dry eye problem. It has a small footprint, taking up very little space on her desk, and is powered via usb to her laptop. She also likes the easy on/off switch. A tank of water lasts about 4-5 hours depending on the level at which it is set.

This has been invaluable for her, and I'm glad I was able to help her out.