"SketchUp users are architects, designers, builders, makers and engineers. They are the people who shape the physical world. They are important, and they deserve great tools because great tools produce great work.
Great tools are ones you look forward to using. They do one thing (or maybe two) really, really well. They let you do what you want without having to figure out how. They help with hard or boring tasks so that you can focus on being creative, or productive, or both. And they are, in their own way, beautiful.
At SketchUp, we do our best to make great tools for drawing. For our users, drawing is thinking. They draw to explore ideas, to figure things out, to show other people what they mean. They draw because they love it, and because nothing great was ever built that didn't start with a great drawing." from source: http://www.sketchup.com/