I really love la fav and they do have gluten free pizza/pasta BUT it is is not celiac friendly in terms of preparation. They try their best but they can’t guarantee (they even say so on the menu). The don’t have separate fryers so avoid the fries etc. I’ve eaten here a lot and only been glutened once on a really busy Saturday night.
Staff are fab and they mark the pizza etc with a special flag so you know it’s the right one.
I think they are a bit of a mixed bag. I've ordered from them before and been ok, but also haven't gotten the most suck I've been from a GF pasta I ordered.
We used La Favorita delivery to our hotel in the Old Town and were pleased. They offer any of their pizzas on a 10" gluten-free crust. We ordered online, so we didn't get to ask them about their prep area, but we experienced no cross-contamination issues (our son has Celiac). Delivery was quite quick and each box was labeled "GF." Overall a positive experience.