I highly recommend taking some time to set up your own Adwords campaign. It's eye-opening.
There are things I like. [targeted emails are genuinely helpful and intelligent based on your situation]
And things that are not so great. [some confusing web UI for newbies, some difficulty getting keyword/landing page quality matched to bids]
http://www.google.com/adwords/?sourceid=awo&subid=ww-et-awhp_nelsontest3_nel_p&clickid
#googplus