Just received this tiny one from a trade earlier this year and must say I am very pleased with it. Had a few intense minutes when it decided to bloom and found that it was monocarpic, but it created some offsets before passing.
Here are some pics to give you an idea of what this one is like. I can't wait to get a larger colony established. Sorry, not the best pics - I will do better when I have more of them.
Orostachys minutum