Report Pundit: Custom Reports

This goes far beyond Shopify's native report capabilities. If data exists in shopify, this app can report on them. The UI is intuitive. They have plenty of canned reports in their libraray and the ability to build custom reports if you want a different cobination of data. And on a few occasions where i couldn't find it, they were always able to help my and build the report for me in a timely manner.