The free keyboard lets you access your clipboard history, contacts, OneDrive and SharePoint documents, and translates what you type into other languages.
The keyboard gets only 2.5 stars on the iTunes store, with 35 reviews in. People are saying it’s slow and buggy.
iOS has weak support for third-party keyboards. iOS is not good at letting you designate a third-party keyboard as your main keyboard; Apple apparently wants you to toggle to the third-party keyboard for some specific reason, then go back to using the main iOS keyboard most of the time.
Microsoft Launches Hub Keyboard for iOS [John Voorhees – MacStories]