SEO / SEM Company Guarantees

Do you guarantee your work? Some companies do and some companies don't. During my travels at one of my favorite forums I found a thread where a SEO client felt he got stiffed by a SEO company. The members reviewed the site and what he should and should not do about it. But what was real interesting is that a representative from that SEO company came to the forum to give their side of the story. Check out the thread at Cre8asite Forums on Bowmac Internet.