We have an extra large square pizza stone... It crisps up the crusts very well... If I ever do carbs again... I'll try freezing pizza shop pizza and warming it up...We just buy pizza and freeze it. We warm it up in a hot covered pan with a splash of water in it (to create a bit of steam). The hot pan makes the crust crispy and the steam melts the cheese from above.
We will periodically get Pepe’s Apizza (New Haven style) and over buy, specifically so that we have some to freeze.