Updated Review: Very Good
In prior review I complained about search. The error was mine. For all those using Gmail make sure your IMAP settings IN Gmail do not sharply limit the folder size. Once I fixed this, search worked great. My bad, not Airmails bad.
I have to compare this to the standards. Inbox and Gmail for me. Airmail comes so close in its approach. Very customizable. Sleek. Offline use a nice feature (though really dwindling in significance, given 24/7 connectivity). Assorted issues are subtle compose inconsistencies that pop up (e.g., subtle but sometimes very noticeable formatting differences when comparing to Gmail).
RogerDarn about
Airmail - Your Mail With You, v1.6.4