diff --git a/README.md b/README.md
index 4f806d1..3f0b1e4 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ A project to turn RSS update feeds into new issues in the projects that depend o
 
 ## Usage
 
-Create a file called `config.py`, which should contain a list `FEED\_READERS`. The
+Create a file called `config.py`, which should contain a list `FEED_READERS`. The
 list should contain one or more feed readers (`issue_generator.FeedReader`), which
 in turn contain an issue poster (`issue_generator.IssuePoster`).
 
@@ -12,13 +12,19 @@ The reader will check up on the RSS feed and compare against a local folder with
 last version of the software it saw (stored at `~/.config/issue_generator` or
 `$XDG_CONFIG_DIR/issue_generator` by default). Then, if the version differs (it doesn't
 sort them, just compare equality), it opens an issue with the corresponding issue poster.
+Currently, there is duplicate issue detection, to avoid posting duplicate issues when
+the config is cleared (e.g. running in a different machine).
 
 See the documentation of each feed reader and issue poster with `import issue_generator`,
 `help(issue_generator)` to see how each parameter works.
 
-## Example configuration file
+## Example configuration files
 
-Example:
+Read the `config.py` file, which requires a `_secrets.py` file (which you should write).
+It uses the readers and posters defined in `issue_generator` to create an array of
+readers. Below there are examples with three levels of complexity.
+
+Simple example: use the available readers/posters.
 ```python
 from issue_generator import GithubReader, GitlabPoster
 
@@ -30,3 +36,12 @@ FEED_READERS = [
                                         token   = "qwerty-secret-token"))
 ]
 ```
+
+Intermediate example: the class `CGJForgejoPoster` in `config.py` acts as a shortcut
+for any project hosted in the organization `archpkgs` in `git.cgj.es/`. Because the
+token, the instance and assignee/labels are the same, the user of this poster can simply
+indicate the repository to use it.
+
+Complex example: the class `UDSClientReader` is a custom reader for a piece of software
+that doesn't publish a feed. Instead, this reader scraps the version out of a JavaScript
+file.