Could an experienced user of this application explain its advantages over others that are similar? The more specifics given the better!

We don't use it; the only advantage I can see is the licenses included as part of the Plant Pro package, so you don't necessarily have to drop a wad on a bunch of Navisworks Simulate or Manage licenses.

I see. We also have Navisworks Simulate. Again, I am the sole licensee of CADWorx Pro and Autodesk Factory Design Suite: Yes, I am nicely equipped with the latest design hardware/software in an otherwise late 90's (as in 2D and predominately ACAD LT tech./engr. users) low-tech CAD environment.

It is a blessing .... and a curse !!!

I haven't used it much in the past due to its buggy-ness and general size limitations, but the new version coming out in 2017 will warrant another look: full 64 bit functionality and management, and a number of stability fixes. It now has the potential to be a low cost version of Simulate, albeit with a few less features.