This article is preserved from the former Printine retail and creator platform. Its instructions are historical, not a description of today’s B2B services. For current services, use the Developer Platform resources, designer resources, or support.
Product reviews are only for products (T-shirts, Stickers, Posters, etc.), not for your particular artwork.
The reviews were written by a randomized group of buyers and they talk specifically about the quality of the product - things like material, size, fit, etc.