We hired Pacificwebtraffic a year ago, to create Paid Search campaigns, and revamp our SEO, got some solid results rather quickly,  The agreement was 90 days so after that we parted ways.  Fast forward a year, rehired them, Month one our costs were cut in 1/2.  By the end of 90 day window our expenditures reduced by 300%,   while sales increased by 34%.

SufinChemical, http://surfinchemical.com/