Many people are using RPS 3D PDF quite successfully.
But there are some known problems:
Model size models of 15 to 20 meg with about 100,000 faces and/or models which contain large background images or large texture images can create a problem.
We do not process edge lines as well as we would like to.
A couple of people this week were unable to use the software because of some missing DLL's
Some changes between SketchUp page views - such as layer changes are not processed by the PDF file.
If you are having problems with a particular SKP file, send it to Censored to protect your privacy and we will take a look.
Al Hart