By itself, the Halo 5 Xbox One bundle is normally worth $499. It includes a 1TB version of the console in a special Halo 5-inspired paint scheme, along with its included controller. It also has some custom Halo sound effects for turning the console on and off, along with disc eject.
There's also a code to download the full digital version of Halo 5: Guardians, along with some other digital content such as the Warzone REQ Pack which includes 14 Premium Requisition packs, FOTUS-class armor, and a multiplayer emblem. The bundle also comes with a physical Guardian model made by Metal Earth, Spartan Locke's Classified Orders, and access to the Halo: The Fall of Reach CGI animated mini-series.
On top of all that, this Amazon deal throws in a second regular Xbox One controller, which is normally worth about $50, and the Turtle Beach Ear Force Recon 50X Stereo Gaming Headset, which is currently priced at $37.50. This Lightning Sale ends in just over three hours, so you might want to jump on this if you have the chance.