I wish I had a use for this, GIS tools usually don't have such a level of polish and intuitiveness. I could maybe see building a capable data viewer on Placemar

I wish I had a use for this, GIS tools usually don't have such a level of polish and intuitiveness. I could maybe see building a capable data viewer on Placemark as a base, but I would be ignoring half its features at that point. Since this was a commercial product for some time, I'd love to hear some user anecdotes: What did they use it for? Did Placemark replace some existing tool, or was it used for new kinds of tasks?