Yes, I have used them. They don't melt and provide nice scrubbiness. I found three sizes, the standard small, medium and large. The medium seemed fairly small and was lightly scrubby. IF you want more noticeable effect, get the large ones.
I add them to one of my sugar scrubs and they are nice. Haven't used them in soap as yet, one of many things on my list of want to make. The small are really small I like the medium ones.
gse - I started a thread on this a few months ago. Look up jojoba beads and you will find it. I love the look, but they're too scratchy for me. I tossed all the soap I made with them as it was unusable for me.