I too am a Mailbox convert that moved to Airmail 2 and love it.
There are a couple things I’d like to see fixed, and the Airmail 2 support team seems very responsive. I had a great little chat with Brenna today to discuss one of those things I perceive as a bug, and I am confident they will actually address it. Definitely worth the minimal investment for an app that handles something as crucial as email.
Jbaile26 about Airmail - Lightning Fast Email, v2.6.1