The Gmail app is slick, but extremely slow for me (on iPhone 5), as in "it's really annoying every time I use this app but I've moved away from native Mail and

The Gmail app is slick, but extremely slow for me (on iPhone 5), as in "it's really annoying every time I use this app but I've moved away from native Mail and inertia is a hell of a thing." Other people I've talked to have had similar experiences. I'm excited to try Mailbox.