I got 30g of wormwood a few weeks ago and have tried it mixed with weed in a two chamber bong and mixed with salvia in my gravity bong. It tasted like shit, and only enhanced the feeling mildly. I would not have tried smoking it straight because of the taste, but from the mild effect when mixed with weed I assumed that, alone, it would not be anything incredible.
I was looking up some information about thujone when I saw that its boiling point is only 1 degree celcius above that of THC according to the sources that google turned up. I just smoked a bowl of it in my vaporizer (a home made contraption, soldering iron vaporizer/bubbler). It actually didn't taste bad... almost a bit like mint. It was also extremely smooth.
The feeling is not unlike that of marijuana, minus the munchies, giggling, and memory loss. I am also more sedated than I usually am when I am high.
The verdict: not bad at all considering the price (I got 30 grams online for $11 shipped) and legality. Wormwood is without a doubt my favorite legal drug that I have tried to date.