diff --git a/README.md b/README.md
index 65f5bcc..4af8d06 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,12 @@
 A Twitter to Mastodon copy bot written in Rust
 
+It:
+* copies the content (text) of the original Tweet
+* dereferences the links
+* gets every attach media (photo, video or gif)
+
+If any of the last steps failed, the Toot gets published with the exact same text as the Tweet.
+
 # Usage
 
 First up, create a configuration file (default path is `/usr/local/etc/scootaloo.toml`). It will look like this:
@@ -56,5 +63,5 @@ SUBCOMMANDS:
 
 # Quirks
 
-As of now, it’s only able to copy text from a tweet to a toot. Call this a work in progress.
+Scootaloo does not respect the spam limits imposed by Mastodon: it will make a 429 error if too much Tweets are converted to Toots in a short amount of time (and it will not recover from it). By default, it gets the last 200 tweets from the user timeline (which is a lot!). It is recommended to put a Tweet number into the `last_tweet` file before copying an old account.