Hi all! I found out what the problem was with the Aura SSD. I had firmware version P0226A, which is causing problems with Windows. Below is word for word response from OWC/MacSales:
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It was recently discovered that some Aura PCIe SSDs for Mid-2013+ MacBook Pro and MacBook Air have a firmware issue which causes the Windows installation process within Boot Camp to hang. This is not related to the Dual Boot Enabler application.
We are working on a solution for the drives that do have the P0226A firmware. When the update is available we will let you know.
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So guys, when I know of this firmware update, I'll post it up for you!