After trying to get it directly from the hybridizer (they were sold out) I got it from a New York state source a few years ago. This has quickly become a favorite yellow. Consistent, ruffled blooms are EMO, flat, substantial, and diamond-dusted. Stamens are usually displayed in an "array". The cultivar starts blooming early (end of May here in 7b) and then instantly reblooms. Wide branching and some bud-building. Good budcount. Dormant plants have pretty foliage. Increase is decent. Pod and pollen fertile. Not sure about rust resistance as it hasn't been exposed here.
Here is rebloom in early August:
Last year, it started blooming at the end of May. 5/29/23:
And a few days later on 6/4/23:
End of June a few years ago: