I'm developing a new website for a client and he wants his products to have reviews but isn't quite sure whether to use a paid system for retrieving reviews like REEVOO or whether to get me to build an internal review system. The internal review system would work based on a customer order number so only actual customers of the business could leave reviews on their website's products. Note: this is nothing to do with customer service or business reviews, just the quality of the products. What would you do? Are services like REEVOO reliable?