The error rate hovered around 50%. I was asked to supply a NAICS or SIC number to match my target audience. The failure rate was about 50% of what was provided. The sheer quantity of failures and the format they required to replace bad addresses (with what?) were impossible to fulfill.
I'm left with a large quanity of junk and server providers not happy with the bounce back rate. Paying a HS student to do a website stripper may have been more practical.