A strong core of all the abilities that you would expect a gunslinger class design to include, that feels balanced and builds well as you progress.
The features help a lot with the flavor that the gunslinger is supposed to convey and match the fluff.
While you will likely find yourself at the forefront of the action, there is enough flexibility available to define exactly what your part in it is going to be.
The subclasses are thematically appropriate and consistent, and distinct from one another.
Compared to the DMG variant, the updated firearms rules strip things back just enough to streamline the experience for the players without making things too easy for them.
The layout is clear and in line with what you'd expect from a 5e publication.
[5 of 5 Stars!]