I've had a set of 3 wool drier balls (a different brand) before that didn't do much for me. But with 6 of these in the drier, the clothes really come out softer! It was immediately noticeable. I've also added some essential oil which results in a light fragrance in the laundry. After a load or two, the oil scent is gone from the wool balls.
I enjoy the little happy faces, too. :)