In the wrong place (rich soil, plenty of moisture, etc.), it's a thug.
In the right place (dry, nutrient-poor, dappled-light), it's perfect.
Here, below our deck, and adjacent to the parking area for the apartment next door, it's been lovely this spring. Patches (transplanted down in the woodland ravine) are equally nice.
We'll see. Rooting it out of its former rich soil spots isn't easy! It's a tough customer and resprouts readily from any rhizome/root fragments left behind.