Yes, quite easy! I have very little android dev experience. Android integration was excellent, I had zero issues. It was easy to ship to the play store (faster and less painful than iOS. And if you need to modify something, you don't need to wait days to get it re-approved).
If you're playing "within the bounds" of what React Native provides, it's wonderful. If you're doing some fairly custom things you may need to drop down and write Native Modules ( https://facebook.github.io/react-native/docs/native-modules-... ), but the ecosystem is growing so fast that there are so many third party libraries that cover many of the custom things you'd want to do ( https://github.com/jondot/awesome-react-native )