The true advantage automation is how I can add more profit items to the system with out adding much time. Add it to the snatch, set up the bulk mail, and remmeber to log in and craft it every few days.
On the crafting side of it I can just empty my mail box into my bags. Then only show craftable items in my professions window. Craft away and then return to the mailbox. The mail box is set up with that same bulk2mail option to send the crafted items to the next stage. Most of the time it is my banker. If I have a set item that I DE all the time, I set that up to get sent to my enchanter. My enchanter will DE it with a macro and use bulk2mail to send the dust to my banker.