Multi-NIC - Multiple Default Routes

I am in the process of studying Multi-NIC; a process by which with two external ISP network adaptors, you can leverage both of those adaptors to distribute traffic in a bandwidth aggregation model.

I came across this article:
https://kindlund.wordpress.com/2007/11/19/configuring-multiple-default-routes-in-linux/

I configured this, and indeed, it seems to work, but need to do more testing with it.