I am going to write a formal review of Bitsy in addition to the several posts about her that I made in the linked thread above.
I got Bitsy from Oakes in the spring of 2021. It did not bloom in its first season. I moved it to a different spot that fall, and it has thrived and become a favorite. Its reputation as an early bloomer is fully deserved; during the last two seasons, it has been the first of all my cultivars to bloom each spring, beating out other earlies like Stella de Oro, Butterscotch Ruffles, and Samwise the Brave.
It sends up scape after scape most of the season, and I enjoy its perky yellow blooms. It's fairly tall here, some scapes reaching 30 inches. I see others comment that Bitsy blooms until frost. We don't get a real solid frost here, but Bitsy blooms most of the season. Best of all, Bitsy has shown no sign of rust, ever. Bitsy has earned her place in my garden.