Sketchup is stunningly easy. I've used programs like Maya, Milkshape, WC/H, Blender, 3DS Max, etc, etc. Some of those 3D modeling programs will actually make you want to quit modeling, never to look back.
Trust me, I had my reservations about Sketchup as well. But given the capabilities of Sketchup vs. ease of use, Sketchup is a really good app to get your feet wet.