I think they were first commercially available last year so its doubtful anyone has crops on them yet. About all you can do is read the descriptions and make your best call.

Scott

What Scott said. I have Joy and Hope. I can say that the disease resistance appears to be good, so far. They were both vigorous growers. Joy seems to be precocious. It kept trying to put out little clusters, but I kept pulling them off. Should get some grapes this year and I'll post when I do.

Make sure you are above the Pierce's Disease latitude or altitude before relying on U Ark grapes. 7b is marginal.