Ah!!! Caramel is a good one too. S. Comfort looks like a bigger Caramel here.
Don't know how they grow in California. Our climates are so different. Many good Heucheras somewhere are difficult to grow here, like Amber Waves. Variegated form or H. sanguinea are often a mess. But hybrids of H. americana an H. villosa are often very good.
Heather, were do you work?