Has anyone had any experiences drinking the green fairy (absinthe)?

I have a bottle of the real deal (of pre-ban thujone concentration) -- something I picked up in (literally) the back room of an underground wine cellar in Prague. The bottle, as it was explained to me, does not say "absinthe" because by labeling it as such, there is a maximum concentration of thujone they are allowed to have in the mixture. However, apparently a loophole in the law does not limit the quantity of thujone if it's not sold as absinthe... So apparently, this stuff has some crazy high concentration of it....

The bottle's been sitting, unopened in my liquour cabinet for over two years now.. Been scared to try it... lol. Should I be?