First thing's first: Glen Powell is incredible in this movie. He transforms across the spectrum of characters incredibly well. He's dynamic and believable in this role that boarders on absurdity and keeps it in bounds.
The premise of the story was entertaining and engaging, with an enjoyable secondary cast.
Adria Arjona was also fun, but her character could've better developed. The high octane romance tag transpires feels entirely too surface for how emotionally involved it becomes in the end. There were no flashes of actual connection beyond sexual intensity and discussion about murder. It would've been nice to see them have at least one "get to know you" interaction outside of the sex-murder dichotomy.
The ending is also.... Unnecessary. Maybe for laughs amongst the people who knew the real Gary Johnson, but for storytelling purposes it was a little too campy.
An entertaining watch, one of Netflix's better recent films. But it does fall a little flat in a couple places.