My rooted Kathleen's black was received this spring, and is in a pot right now. It has not fruited yet. So I can't comment on the fruit. But it appears to be a very strong grower.
Herman It does indeed look like a very promising cultivar. Especially the fact that you have yours planted in ground and your brebas survived the winter.
Herman your Pictures did not up load, Can you repost showing also the size of your in ground plant?
thanks. Bob