You become immortal and have perfect and unlimited memory being able to fully recall any event that has ever transpired in your presence. you are unable to die, be injured or feel pain. Also, you will remain in prime physical condition regardless of what age or condition you are when the button is pressed. And are also still able to eat, have childeren and function normally. While you can eat you never feel hungry and there is no limit to how much you can eat or what you can eat as long as you chew it with normal human bite strength. Also you do not need to breathe.

You will remain the same for all eternity, Eventually outliving the human species and any that come after. Eventually you survive the destruction of the solar system and the heat death of the universe and whatever comes after. You will not be able to sleep and feel no need for it.. You will find no refuge in madness, as your perfect body keeps you sane. For all eternity.