Additional documentation on Field Formatters and Views formatters would be helpful.

This is not a project page, so duplication of the project page's claims does not help much.

It'd be nice if this documentation page would not just announce the features of the module but explain how to actually use it. It might be even helpful to distiguish which parts are for end-users and which one are for developers only.

For example, I don't see anywhere a currency exchange block/page I could simply enable and I can not figure out by looking at the configuration page, with which modules 'currency' might integrate. Also I see localization options in the administration backend, but not in the user frontend. It would be nice to have a field formatter that allows to display a money value, e.g. in Euros, and side by side in US$. I could not find neither such a field formatter not a exchange rate conversion block and ended up with the user-friendly 'currency_converter' module that neither integrates with 'currency' nor provides exchange rates for GBP, RMB, or Yen.

The handbook page would be the right place to explain everything that is not self explaining.