There are plugins to see the real prices btw.
Airbnb is a simple CRUD app...it’s hardly a shining example of hard deeply technical engineering problems that are fun and interesting to work on.
I had an opportunity to work with some of their open-sourced tools (Airflow was one of them) about 5 years ago at my old workplace, and the quality of their product and documentation is nothing but superb.
At my current workplace, I use Enzyme all the time when dealing with unit tests, and it seems to be pretty much the industry standard for React UI unit-testing.