Mixbook.com is a legitimate and well-regarded photo printing service. It has received positive reviews from various sources, highlighting its ease of use, superior image quality, and good value. Customers appreciate the intuitive software, variety of creative options, and helpful live chat support. The site has a high rating on Trustpilot with many users praising the quality of their photo books, calendars, and cards. However, some reviews on Sitejabber mention issues with customer service and high costs. Overall, Mixbook is considered a reliable and user-friendly service for creating custom photo products.