SketchUp in my opinion (and many others in the community) is a world-changing product because it bypasses the biggest issue most people have when learning to draw: The ability to take something that's 3D and represent it in 2D. It's simply the best at doing so because of these four important things. 1.Easy to Start 2. Inexpensive 3.Used by Professionals ... Also, Sketchup has also found success with people who want to create, share, or download 3D models for use with 3D printers.