Rapid prototyping/concept modeling is something we're very well known for at IDEO so MoI is definitely a good fit.

As I think I mentioned in my very first post here (and I feel this to a greater degree now that I've become more accustomed to MoI), the workflow reminds me a lot of Sketchup. They're very different products that deliver very different results but they both enable an individual to rapidly rough out ideas whilst maintaining CAD accuracy.

We'll definitely be purchasing when V3 is released (and probably a license or two of 2.52 in the new year).

As for modelling being fun, I'm one of those sad suckers who finds it all fun - complex & detailed or fluid & simple, it's always the end result that provides the buzz. :)

jm