Michelle Urban
Michelle Urban reviewedThe SaaS Guide to Search Engine OptimizationA free guide to doing SEO for your SaaS company
 RecommendedPros: 

The source of truth for SEO.

Cons: 

Lots of words - but they are useful.

Every CEO, marketer or wannabe marketer should read this and then re-read 3 months later.

Michelle Urban has used this product for one day.