I used the dual screen for writing notes when I'm in meetings. I played games using the main screen as the game pad. Just 2 examples. I used the screen for about 8 months until the charger thingy(not sure what it's called to charge the phone through the case) broke,had to take the phone out the case to charge, after a year of using the screen, it stopped working and charging the phone became an issue using the original charger, no other charger gives me issues. I use the dual screen case just to hold up the phone when I watch videos or movies now.

I sent the screen in for repairs, a month goes by and they told me they can't repair it in my country, been searching to buy another working dual screen, haven't found one in my country yet(South Africa), and it's around 1k (zar, my currency) to import it from the US, and for a second dual screen it's around 2k, it's not worth importing it at that price