I personally have used comment boxes to provide instant feedback to students on concept check quizzes that I require students to take after watching recorded video lectures. However, there is character limitation in the comment boxes which if exceeded will prevent the question from compiling. When typing explanations and solutions in the comment boxes, I found I would frequently exceed the character limitation. We are requesting that the character limitation in answer comments on quizzes be removed.
Idea originates from Vincent Bonini and the Math Department at Cal Poly.