I love what you've done with Membership 3. I used to get sad and distant eyes when I talked about the three plugin suites that WPMU didn't do well on. Espresso Events, Jigoshop, and Magic Members were still required in my professional portfolio. I'm pretty sure I can cross the membership sites off of the list.
Here's my question though - because it wasn't totally clear from the run through I just did on my trusty local WAMP server.
What is your level of integration/support for AWS CloudFront or S3? I generally use CloudFront as a pull-type CDN through W3TC. I know that Magic Members has some level of support for remote content protection. What is your setup?