Have you tried bidding for a specific position? Findings? Questions I have:
(lets assume we're bidding for position 3)
1. Does this kill your #1 ranked words -- will adwords move it down to 3? could your CPC go UP while your position drops? Or do good ads override the bid system.
2. Best ROI? #1, 3, 5, etc? IN MOST CASES (obviously there will be outliers) what has performed the clear cut best based on ROI? How about in lowering CPC? Does bidding down a few spots REALLY lower your cost, while barely hurting your conversions?
I have some other questions, but I'd love to hear what those with true experience have to say first.
I feel this is a very POWERFUL tool, if used correctly. If used improperly it could destroy an account - like mine!
Hubes