Should withstand z6.
I thought it tasted good. But I ripped it out because half of the vine died off and then I found out it's prone to doing that. I don't know if it would to that less in z6 or if it does it everywhere.

I have one Himrod and it survived a cold winter in 6A (-7F and 5 times of -5F or lower). Some vine cold damage and no fruit this year. On the other hand, with some minor pruning and no fruit load the vines have been highly vigorous this year in vegetative growth.