To get started run yarn install and then either launch the app with the expo CLI (expo start) or run the repository with the SDK (https://expo.io/tools#sdk). You'll have to create a free account and log in if you haven't done so already.
You'll also need to install the client app on your phone (https://expo.io/tools#client).
A little obvious, don't you think?
Developing apps on your actual device is fun and rewarding. So is using the extended SDK they've been working on. Go check it out!
Any app that becomes relatively complex benefits from a more deterministic and organized approach to managing data and state
getState is quite useful in actions when you have to pass along user tokens and other data you'd rather not repeat at every action invocation
Included by default in Expo's boilerplate, seems to do everything I've needed to do so far
Pulls in some useful functionality to reduce boilerplate for your actions, makes handling fetch calls real easy
Easy enough to get up and running with an example (free) API that offers some relational data to set up a few screens