Anyone with Boxer e-mail app for IOS experience?

[Hellfury]

One of my users who doesn't want to leave the iPhone behind and move over to Samsung and Knox wants the opening of the exchange mail account (and calendar) to be password protected. We only have 5-6 people clinging to IOS for phone/tablet (but they're the bosses, so I'm not getting very far with them...) and Citrix isn't really an option on the table atm.
Our BYOD policy is mostly "Don't!", but I need to find an e-mail app for IOS that'll do what my user wants. Boxer (http://www.getboxer.com / https://itunes.apple.com/us/app/boxe...561712083?mt=8 ) seems to fit the specification requirements, but do anyone have any practical experience or otherwise acquired knowledge of how well it works?

[xerodok]

What are the requirements you are looking for as far as the app goes?

[Hellfury]

Hmm, not too many requirements really, needs to:
Password lock on opening app(s)/accessing content.
Has to work with Exchange (we run 2010)
Has to be able to deal with attachments (forward without download etc.)
Ideally with a calendar option (would somewhat defeat the point to have to keep the exchange account in the normal phone/pad settings for calendar and just flip the mail off).
Ideally very little usage tracking beyond the bare basics, there shouldn't be any very sensitive info entering it's way on there, but can't have it mirror content with other servers etc.