I too have a 2012 Pro-4X, purchased slightly used with sliders. I miss the step rails that came on my 2000 Xterra as they were convenient and light weight, not so with sliders. I have what appears to be Shrockworks, but not certain.

Positives include the rough and ready look and real world protection off road. Though I don't do serious off-roading very often, my old X had a large dent in the rocker due to a tree branch being levered into it on what otherwise was a mundane logging road.

There are several negatives. First being that they stick out farther laterally than step rails and when dirty transfer that dirt to you pants when exiting the vehicle. Also, my 12 year old daughter also has to use them to climb in and occasionally slips on the round tube painted surface. And of course they are heavy walled steel with adds weight to an already porky vehicle.