Its pretty feature rich, but some key parts are super annoying
1) entering password almost every time - Touch ID would be a huge win
2) the weird way it handles attachments
3) seems like every 3-4 weeks it just stops working, I have to re-install and get a new PIN
4) need better customization of notifications and alerts
Otherwise not as bad as people make it out to be.
froggling about Good for Enterprise, v2.8.1