It's good but not great. On the Shockwave Radio scale of 9 to 23, I'd give it about a 18 or 19. The first one was an amalgamation of the serials of the 30s and 40s. This one pays homage to a staggering amount of movies/genres from the 50s while continuing the story arc. It works, mostly.
Oh... you don't have to stay through the credits.