Like many who wondered here, I was looking for a replacement of the other stuff I had bought for years that was no longer on shelves. A little WWW investigative work led me to the story of Underwood Ranches. Needless to say after finding out the story about Underwood and the folks who made the other stuff, I ordered a couple bottles.
So far, so good. It's not spicy to me, but adds a nice kick. This is my go-to 'this dish needs a little pizaz' sauce. Definitely filled the void that was missing ...