The ability to create 3D drawings that are accurate for use by engineers who need specific measurements or shapes. It's slow compared to other CAD programs like Solidworks or Catia so it takes longer than I would prefer to create complex models. If you're looking for something fast do not choose this program if you have any type of efficiency needs because there isn't enough speed at which you can draw out your design/measurements. We needed an easy way to get all our drawings done within one computer system instead of using multiple different ones with little overlap between each of them. With Archi we were able to keep everything organized and easily shared with others in the team.