What is the better option for Asp.net mvc: Entity Framework or ADO.Net (data access) for performance and flexibility?

From my experience. Entity is better for maintainability. First, most of the design with Entity framework is a breeze with the new UI using DBML. Secondly all your calls to the database like add/edit/delete are handled seperately by classes by EF and you do not need to manually write your Connection string and calls.