Report Pundit: Custom Reports

We use Report Pundit to create supplementary reports to the standard reports available in Shopify and have found it very easy to create the reports we need, they also have a multitude of ready-made reports that can also be adapted if need be.
Their recent refresh also seems to have made things a little better organised and clearer. Their support team is also very quick to respond and resolve any issues you may have (But have had very few issues)
A definite, must try if you are in need of more reports.