The only tire I have found that can withstand the extremely sharp rocks of central Arizonas backcountry trails. For years, I've cut sidewalls and punctured the tread on all of the toughest tires. The Wild Rock'R is the first tire I've worn the tread out before the sidewall for at least 5 years.
I am new to fatbiking and I quickly learned that studs are necessary to ride during the winter in my area. Before having studs, I fell constantly. My tires would lose grip and slide like crazy on all the patches of ice. Getting the Dillinger 5s was a big improvement. The bike was able to stay upright better on the patches of ice and there was not any noticible difference in speed or performance. HOWEVER, I have still managed to make these tires slide out when I ride quickly into corners or other aggressive maneuvers. I have just learned that I cannot ride as aggressively as I typically do in the summer on my full-suspension mountain bike. I would still recommend the Dillinger 5s as they seem to be some of the best snowice tires available. But do not expect to gain unlimited grip.