So I've been to this location and the one is portsmouth about a dozen times. I use a Nima sensor and I always test my food from restaurants for gluten. The Manchester location has only ever tested positive for gluten once which was the last time I went there, about a week ago. The portsmouth location has never tested positive for gluten. The food is very heavy and as someone with IBD as well as celiac, it's rough on the stomach, but usually gluten free.
— Not very
— Gluten-free items are marked on the main menu
— Most/All
— Excellent