README.md in expandsync-0.1.0 vs README.md in expandsync-0.1.1

@@ -5,12 +5,40 @@
 
 # Installation
 
     $ gem install expandsync
 
+# Warning
+
+ExpandSync is still *heavily* in development; as such, expect this repository to change daily. **USE AT YOUR OWN DISCRETION.**
+  
 # Usage
 
-TODO: Write usage instructions here
+TODO: Write better usage instructions
+
+Syntax and usage can be accessed by running `expandsync --help`:
+
+```
+$ expandsync --help
+Usage: expandsync [options] atext_filepath
+
+An engine for synchronizing snippets from aText on OS X and TextExpander iOS
+
+v0.1.0
+
+Options:
+    -h, --help                       Show command line help
+        --version                    Show help/version info
+    -a FILEPATH                      Specify an output location for aText rules (default to /Users/abach/aText-snippets.csv})
+    -n                               Disable backing up of Settings.textexpander (RUN AT YOUR OWN RISK!)
+    -t FILEPATH                      Specify a location for the TextExpander iOS XML file
+    -v, --verbose                    Turn on verbose output
+
+Arguments:
+
+    atext_filepath
+        The filepath to a CSV file exported from aText
+```
 
 # Contributing
 
 1. Fork it ( http://github.com/bachya/expandsync/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)
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