I was taken here for dinner by two friends whilst I was visiting the St Louis area because they knew that the place offered gluten-free and vegan options, which would suit my dietary requirements.
I was really impressed with the decor and general feel of the place. The food was excellent - I opted for a thin gluten-free crust with mushrooms, artichokes and Daiya vegan cheese, as well as a lemonade. My friends enjoyed for thin crust pizzas too (Berkley and Lincoln Park) with one of the interesting ales that Pi also serve. We also ordered a big salad to share on the side.
The meal was really lovely, even if we were defeated by the size of the portions we had ordered. It's a shame we don't have places like this in the UK. I can see why President Obama is a fan of the place.