I upgraded from two 970's in sli to this card and saw a 30 to 50% performance boost. Very happy with upgrading. I would suggesting getting another brand like evga or msi as they include more in the box.
Nice look; Very fast; Quiet; Very slick green LED on side that says Geforce GTX 1080 that looks amazing with my H100i cpu pump set to the same color; Best upgrade performance wise
You only get the card; No adapters, swag, and anti static protection; Very cheaply packaged once you open up the box; For a card that's cost this much I would demand more accessory and adapters included with it and or free games.