I work for URS in Princeton, NJ, as a Piping Design Supervisor. Our primary design tools here are Intergraph PDS and SmartPlant, but most of my experience is with MicroStation/J.
I have 37 years experince in Power Plant layout and piping design. Trained on the Intergraph VAX system in 1986. Been using MicroStation for about 18 years starting with version 3.3.
I've done a lot of development, mostly with plotting tools, macros and user commands.