I'm sure there are other discussion areas for NavisWorks and other packages but it as relative to PDMS as any other 3rd Party Software (Ceasar II, Walk-Inside, M2CAD, Advance Steel, Laser Scan Software, etc.). If PDMS users can benefit for any of these packages and are actively using them within their firms, then discussions on them is justified on this forum and I would encourage users to speak out about them all.
PDMSWORLD has a specific area for this type of application (Model Review Software General) where all 3D "Fly-Thru" Applications can be discussed (pros/cons).