Ah..... Absinthe!
Since 1912, Absinthe has been illegal to sell in the US until last year. It was not illegal to purchase or possess, only the sale of the product was outlawed.
Due to the law change regarding Absinthe, there are now three major brands approved for distribution within the US. There is nothing special about the US distribution, in fact, less special than the "true" stuff from Europe. The US distribution contains no wormwood and has limited thujone. (perform your own google search for thujone and wormwood for more information about their magical effects!)
If you want the get the good stuff, visit
http://www.greenfairy.org/ and order some of "The Green Fairy".... hell, even if your don't get the effect, it is 73% alcohol so you will catch a buzz.
For the US product, unless you want a nasty tasting drink, I would pass...... but if you can get the Europe product.... deal with the taste, and go for it!
As Oscar Wilde wrote about Absinthe:
"After the first glass you see things as you wish they were."
"After the second you see things as they are not."
"Finally you see things as they really are, and that is the most horrible thing in the world."