Views vs. EntityFieldQuery
It was recently written that there are several benefits over EFQ, entityfieldquery over other methods:


OOP - EntityFieldQuery provides an object oriented programming approach that allows you to create abstract classes to extend.
Flexibility - An advantaged arised from #1, creating your own objects allows you to modify the entitycontroller to do more things: Store field data via mongo DB, return data into blocks only, etc.


Source: http://chris-on-the-web.blogspot.com/2012/03/drupal-7-views-vs-entityfieldquery-pt1.html