I've done it. It's interesting. But not really worth it. You'll smell like a bottle of rubbing alcohol for hours . . .
it's like super alcohol. in terms of molecular shape it's two ethanol (drinking alcohol) molecules stuck together. very flamable gas, so be careful. not sure about the health effects, but it's probably pretty easy to OD on.
not worth it unless you are working on some lab project that requires it and you happen to get a nice whiff of it. If you do try it be carefull not to suffocate yourself and make sure its good pure stuff. Too much, too long of an exposure, and you will damage your brain.