Buy it if you are already an AVEVA/PDMS shop. Skip it if you are starting from scratch and can wait for E3D 2.2 or later with better cloud support.
Even with a model containing tens of thousands of objects, panning, zooming, and view regeneration in 2.1 remained surprisingly snappy on standard workstation hardware (tested with an i7, 32GB RAM, and a Quadro P2200). The LOD (Level of Detail) management is robust. aveva e3d 2.1
Creating or modifying a piping specification (Specon) in 2.1 requires a deep understanding of the underlying catalog structure. There is very little GUI hand-holding. Expect to spend days training a dedicated administrator just to manage bolt lengths and gasket thicknesses. Buy it if you are already an AVEVA/PDMS shop