Mailbox's elegant approach, simple design, and system of swipes that handle email and task management make this app worth trying for everyone who uses Gmail on their iPhone. For someone who lives in their inbox, and uses email to manage tasks this may well be the best app to date. The UI is sophisticated and easy to use, as is email composition and reading. But, its long waiting list and exclusive Gmail-iPhone compatibility will exclude some iPhone users from trying the new app out.
Mailbox's system of swipes is clever. When I viewed a list of email messages inbox, archives, etc. I had a choice between four possible swipes for each message: half way to the right, half way to the left, and a full swipe right or left. Each option presented a choice about how to handle emails.