I recently made a trip to Warsaw, and so had the chance to try out using PassWallet with my Wizz Air boarding pass through their Android app.
Upon completing my booking in the Wizz Air Android app I was prompted to use PassWallet:
As I already had PassWallet, I proceeded to download my boarding cards.
Clicking on the boarding card button simply opened PassWallet and imported the pass:
A quick press of the back button to import the second pass, and we were good to go.
I could then easily share the second pass with my girlfriend via email, and we were both ready for our holiday.