The Advance Check-In system at Hilton Downtown Atlanta aims to enhance the guest experience by integrating a customized and sophisticated check-in process using technology. Guests can select their preferences through a portal, and a dedicated hotel staff prepares for their arrival based on the provided details, while the service incurs a $75 fee and is only available for bookings made at least three days in advance. This system has the potential to generate up to $12 million in additional annual revenue for the hotel by improving efficiency and guest satisfaction.