Tonearm - 1:34 am on Dec 13, 2012 (gmt 0)
I don't bid on the content network so the only stuff listed there that I can't control without CO are operating system, browser, search partner site (is this still true?), and particular broad-match query.
If Google does a good job splitting up broad-match queries, somebody should be able to define only a relatively small set of broad match 1-word or 2-word phrases and CO will take care of the rest. Does that work?
Letting Google determine my bids is also kinda scary. Do they keep your best interests in mind?