Got my seeds and extract in at the end of last week, but just got back in town myself tonight.
I took a very small taste of that stuff (dipped a toothpick in half way and put it on my tongue) and WOW is it hot. I'm have a pretty solid tolerance for heat, so my reaction to the heat wasn't much. That isn't to say it isn't hot, though.
My wife got the guts to give it a try. Jalapenos are more than she cares for, to give you an idea of where she stands on heat. For her, I put the smallest speck of extract on the very tip of a toothpick. It hit her tongue and she was instantly needing the milk. Red face, sweat, cough, the whole nine.
Good stuff. Worth the $20. Now it is off to learn how to get the highest yield out of my seeds.