ViHN brings Vi-style key bindings to enhance browsing Hacker News, offering a fast and efficient experience. The program allows users to navigate stories and comments using familiar Vi key bindings, making it easier to browse various sections of Hacker News such as front page, /new, /newest, and more. Additionally, users can quickly find new comments with the "n" key to browse comments in reverse chronological order. ViHN also features quick-reply and quick-edit forms with comment previews, along with highlighting the original poster (OP) in comments for better readability.

The key bindings in ViHN provide seamless navigation within stories and comments. Users can easily move between comments and stories, open links, follow threads, upvote or downvote, favorite or flag items, comment, reply, edit, and delete comments, all with intuitive key commands. The program also offers specific key bindings for navigating the Newest Items list efficiently.