Merchant Circle is a business website which like many others puts businesses on their site for free and then encourages you to pay to upgrade. As far as I know, they don't charge anything for customers to view the site or to post a review. Please let me know if you find they are charging so I can note this here. I have no current reviews on this site yet so please feel free to write a review if you are a current or past student of mine.
Write a review. Note the location of the "Write a Review" button on the figure below before going there.