That's good to hear! I also have aloe growing but not ready to be harvested yet. The Anredera I used has a huge amount of saponins, a handful of it are enough to treat 5 gallons of water. There is plant of the same species as the one you mentioned around here, but not exactly the same variety. The flowers are edible. I guess I could grow that yucca here, as similar plants grow well here. They are called Itabos I think.
Edit: The variety that grows in my country are called Yucca gigantea. You put the white flowers in boiling water till the are cooked, let cool, slice and add eggs, cook till eggs are ready. Add salt and serve. People here love it, I don't like it at all. A little too bitter for my taste.