They were released very recently, so I don't think there's going to be too many with experience yet...
I can tell you that Cepek tires are made by Cooper in Findlay OH. That one looks like a ST/Maxx mated with a FC-II. Both of those are good tires, and both on the heaver Cooper carcass. If this one is on the lighter carcass it would make a great tire!! Unfortunately, DC tires usually come in only the most popular sizes, so I won't hold my breath for a 255/80R17...