Rubrics can be great when created well. Analytic rubrics ensure consistency in grading and help reduce students from thinking there might be a bias towards their work. If you use an analytic rubric when grading, students can easily see what they have done well and what they need to improve on using the specific components of the analytic rubric. I think it also helps instructors when grading because it helps them stay focused on the important elements of each assignment. Instructors can also use well written analytic rubrics to shape their lectures, and stay on track throughout each part of the course. They can use an analytic rubrics to adjust their course if they find their students aren't grasping certain components.