I bought my first Vornado from woot! back in January 2010. In the summer I turn this thing on, put it at the base of the basement stairs pointing up and leave it on till the cool weather comes back, 24/7. For months. I cannot kill it.
I've even bought a few more, they are that good. It really helps the air conditioner run much more efficiently.
I don't need another, but damn you woot!, I think you've sucked me in yet again.