I agree that it is quite non-descript. I have never used it, as it has little to commend it. But it has its uses. It tends to smother out lower plants and presents a clump of plants with very uniform height. A good plant, en mass, if you have the situation and room for a clump. The foliage that could be used in contrast to other woodland plants. Such plants, as Astilbe, have nice foliage and value beyond flowering.