Latest Killer App from Google. If you want to show how you dream home should be to your builder, This is the right tool.
It took just 5 mins for me to work on the above image.
I remember when you work on the 3D softwares like 3dStudio Max and Lightwave 3D, it takes little time to create these bevels and offset, With Sketchup it was with ease. Their tutorial is neat and precise and Product user experience is great.
and finally the URL: http://sketchup.google.com/