Feedback tells you to do too many things
It is personalized and gives solid feedback like it claims to do, but the feedback gives you too many "suggestions" and things to incorporate in your responses, which you don't really have the time / ability to do in a real case interview. not to mention that it might show a lack of prioritization. I think that for anyone using it, you'll have to manually focus on which part of the feedback is most important for you.