Hi There,
I will be happy to help you with that.
The biggest down size is the price of the oven.
But there are many advantages such as not having to rotate the pizza, very even and consistent cooking result and you really make the most of your floor space.
You have the option of gas of wood fired oven.
Let me know if you want to see some pictures or videos of FGM ovens along with the technical data sheets.
Antoine