Submit a Groupon review & rating re: good/bad customer service, price w/ discounts, coupons and promotions + the quality / effectiveness of the product(s)/service(s). Have you been scammed by Groupon? You can write a Groupon complaint or post a warning about Groupon including Groupon's service or product safety. Or as a happy client you can describe the great products & services offered. Share your feedback with others.