Ah, I think this is one of Sanderson's better novellas, easily, and not just because it's housed in a police drama genre. :) 
 The simple concept of a whole world that can be replayed like a virtual reality is very much a Cosmere concept, but what he does with it, replaying the reality of the last day in order to hunt down a serial murderer, is really cool. 
 I can totally see myself getting into this as a part of a longer series, but the actions and events of this one is quite satisfying. I'm not complaining at all. 
 Simple story, interesting reveals, and best of all, a very clear voice and classic cop characters... with a superb twist. :) 
 (Even if it's kinda predictable, it's still a very well-written and satisfying story.)