It is great, but some essentials missing
The functionalities built-in are almost overwhelming, fantastic, however, since I am no longer willing to send private/privileged contents by the internet equivalent of a postcard - which unencryoted e-mail in fact is - I am missing S/MIME support (which Apple Mail for iPhone has got), or, even better, GNUPG support.
pirxster about
Airmail - Your Mail With You, v1.1