The domain weight-talk.co.uk could be a great idea for a website dedicated to weight loss products, services, and information because it is concise, easy to remember, and directly related to the theme of weight. It clearly indicates the website's focus on discussing and providing solutions for weight-related issues. Additionally, the ".co.uk" domain extension suggests that the website is specific to the United Kingdom, which can help target a specific audience and create a sense of trust among UK-based visitors. However, it is important to remember that the success of a website ultimately depends on the quality of its content, user experience, and marketing strategies.