@aaronpk mostly the same. It's kind of surprising how little of interest I found once I got in the app (even though I knew it wasn't for me with no IMAP access or bring your own domain yet).

I think only two things really "stuck" with me:

1. I like the idea of whitelisting folks sending me email for the first time. I think.
2. I like the idea of a feed-like interface for processing inbox email as a UI/UX.