Game Level Design Using Sketchup

I haven been trying to experiment environment design with Sketchup. Ever since I saw the video of how Sketchup was used in Uncharted 2 for level design, I am been eager to try it. I think its ability to let user bypassing many technical 3d modelling hurdle is great for quick design visualization in 3D. Here I try to use Sketchup for block out major shapes and overall layout of a top down view game environment. Still not entirely comfortable with it yet, since I only started using it for a couple of months.