I received a good-sized clump of Grape Velvet as a bonus (at my request) in one of my orders of fall 2021. I had seen in the database that someone on the West Coast in my zone had had good luck with it. Brian Reeder also carried it for awhile, and it got good rust-resistance ratings from him.
The plant has not bloomed yet, so I don't have much to say except that it has grown well, has healthy foliage, and has sent up a couple of scapes. I will add a picture when it blooms and will report back if anything changes in this positive review.
Edited to add a bloom picture:
I am editing this to add that Grape Velvet is one of the last of my dormants to reappear each spring.