I've been using this plug-in for quite some time, but I think that wp-o-matic was better. There are some serious bugs and features that are currently missing.
Making a list of things here so that they don't fly under the radar. You can help and add your own.
1. [feature]: Use feed date and time
2. [Feature]: Check last run time, and only fetch newer posts
3. [Bug]: Creates duplicate posts