The M&G Retractable Gel Pen 0.5mm Set of 12 receives high praise for its convenient retractable design and smooth writing experience. Users appreciate the three-color ink option, which allows for easy switching between red, blue, and black without needing multiple pens. The 0.5mm fine tip provides clear and consistent writing, while the ergonomic grip enhances comfort during extended use. Customers who have purchased the set multiple times highlight its reliability and value for learning and office tasks.