Usefull to go very fast and quickly made some houses, boxes, even some level ground layout etc ... and version 8 have Colloda export.

1 min modeling :


Blender 2.6 and above import :


Med (obj format) import :


Even after grouping objects, calculate normal outside, there is a problem under MED.
Perhaps because the model is not closed totally, and i forget to merge duplicated vertices also !

5 min sketchup quick dungeon level stage :




Well, i encourage lot of people to use it for modeling obects or hard surface stuff for projects , it's so intuitive and eay to use compared to big programs (like Sculptris compared to Zbrush) !

Sketchup Downlaod link (Official site)