Funny you should ask, we made it last night. The tortillas I used were slightly larger than the pan, so they developed a short, crispy rim, which was good, and handy for sliding the pizzas out of the super-hot pan. It was reasonably tasty and will be added to our pizza rotation, but it wasn't life-changing, primarily because they weren't all that filling and they lose their heat quickly. The smell of the cast iron pan pre-heating isn't all that aromatic either.
If you're cooking for more than yourself and you have two cast iron frying pans, I'd fire up both of them so you can crank them out faster.
