I've just finished my first major redux project and found it incredibly slow to develop with. Write an action type constant/action creator/dispatch/reducer/mapStateToProps just to show an element in response to a mouse click? I found myself cutting corners on the UI because the amount of code I'd have to write makes it seem like a huge task.

I'll be evaluating mobx for my next project, definitely, along with Relay. If I can maintain the same view-as-a-function-of-state approach of redux while writing less code, I'm sold.