I don't know that I am sure they are non-directional, but I looked at them carefully and there is no arrow or any other indication on the sidewall that they need to rotate in one direction. Plus the tread does not look to my admittedly unskillled eye like it is directional. And the manual literally says not to rotate "2WD models with 18-inch or directional 17-inch tires."
I am a pretty tame driver. How many miles should I expect to get on these tires?