A bit of a counter point.....
Prior to SketchUp I used 3DStudio Max, Infact I'd used 3D Studio since it came on 5 1.44Mb floppy's and was made by the Yost group! SketchUp was and still is a blast of fresh air.
I love SU BECAUSE it cant/doesn't render, No 14hour waits to see if the image is OK, No umpteen controls for each material to tweek, No crashes 99% through a 10hour render, No.... you get the picture.
The more you try to get a material 'right' the more it becomes 'just not quite right' and the more you tweek and the more you render....AND IT'S STILL ONLY FOR 1 IMAGE!
With SU I can plonk a good brick texture onto a wall and guess what?......It instantly becomes 'A brick wall'. I don't have to worry about the texture of the brick, the depth of the coursing, the colour of the mortar etc. etc. etc.
Don't get me wrong, I love a good rendered image and recently I've shelled out some of MY OWN money for Twilight just to get my ''eye back in' but trust me, it'll be a cold day in hell before I go back to the likes of 3D Studio. 