I grow Cymbeline in my garden in Melbourne. I have to agree with you Steve. Great form as a bush, spreading, arching strong growth that needs quite a bit of space. And the flower....fragrance to knock your socks off and with a beautiful form. It sets superb hips and flowers very late into autumn. The fragrance is not as fickle as some of the newer austin's: it is strong in very cold wet weather and still remains strong at the end of hot windy days. I find it 'interesting' that this rose is not mentioned in any current lists of "older/superceded" varieties by David Austin Roses. There is such a list in their new book "English Roses" that lists all sorts of odd roses that were either never released into commerce 'Admired Miranda' or were superceded "Cressida". Cymbeline in David Austin Senior's book "Old Roses and English Roses" even receives a " * " indicating varieties according to David Austin Senior that show great garden worth: health, bush form, vigour, fragrance....
Yet now it is trying to be wiped out of the history books as though it never existed.........

I grow this rose in California's San Fernando Valley, it certainly follows Steve's description. The fragrance is great in the bud and on the opening bloom, strong and highly charged with myrrh; but in most weather is gone by the time the rose blows.
I've discovered that proper pruning can make a very big difference in keeping this rose well foliated, unless the basal breaks get cut back to four or five nodes, they'll only produce secondaries on the terminal handful of nodes, leaving up to two meters of bare cane.
BTW - if anyone in or near Los Angeles County wants one of these shrubs, right now I have half a dozen small ones in 2 gallon cans to give away to anyone willing to shlep over here to Valley Village and pick one up. Send me a message and I'll set one aside for you.