Not too bad looking. They have the syndrome that Cryptomeria do, but even worse, of looking bad on bad sites or when conditions are in some way suboptimal for them. NB I know they do the shedding of old branchlets thing, regardless. It's just that they either hide the dying branchlets better or maybe shed them more cleanly, when the plant is happier. The flip side of that is they seem to be willing to soldier on indefinitely compared to other things that would just give up the ghost. I was on a drive I'd never been through in NE PA, some backroad north of Allentown but I was heading east - actually going to Well Sweep Herb farm in NNJ. (One of the best places to buy herbs and greenhouse perennials on the east coast.) Anyhow that area is definitely 6b if not 6a, but I saw a haggard old Cunninghamia that had clearly been winter burned many times and had a LOT of dead branches, but it was still going. Wish I'd stopped for a picture but had to keep going.