osbornecox
Thank you - that is a useful distinction.
It seems to me that the OGs should be used in the latter stages of test prep - once the concepts are clear in one's head, and practice becomes key.
As someone who got a great score and is at a fantastic university, any thoughts?
Let me disagree with you

If I began my GMAT journey again, I would go following steps:
- read about GMAT format
- take GMAT Prep1 from official GMAC site
- define my weaknesses.
- go trough OG with timer and focusing on weaknesses.
- get something additional only from weak area. (In my case it would be SC and RC). Participate actively in the forum.
- take GMAT Prep2
- regularly come back to OG reviewing all questions that I got wrong or spent too much time.
- take GMAT Prep1-2 2-4 times.
- 2 weeks before Exam: only OG and GMAT Prep.