İ think using companion with mobil data is sometimes may be expensive. But new update very good for using pc with ethernet and phone with wifi internet shared by that pc. And some people who can not share wifi from pc or have not wifi router in their home may use starter with usb for live testing. Thank you
i think a great bomus is that , you can say to your friend, hey lets tet this. You send him the code and he can test you app, without install the app and config the apk that he can see that what you want to show him. If you have different screens and you want to show him some things but your apk is not finished config, normaly you send him a apk, but the apk need to be finished, that you can look at all things, in the builder you click on it what you want and you see it.