This tool in combination with pmacct allows you to get the full BGP feed from your upstream providers/peers and install on the FIB only the relevant prefixes for you. The main benefit of this approach is that you will not need a very expensive router to do peering. A cheap and very fast switch might be enough.
I recommend you to start reading the How To: Simple Setup, there you can see what this is about, what you need and how to achieve it.
You can also check the following slides and video.
You can find the documentation on Read the Docs.
This software is in very early stages. There is a lot of documentation missing and some bits and pieces might be refactored. If you plan to test it I suggest you contact me. I can help you to deploy it while keeping you informed of the changes I might be doing that could potentially affect you.