Yes, we've been to that one, as well as one or two other locations over the years.  They are very good and knowledgeable in my experience.

We had a good experience at the one outside the New England Aquarium in Boston.  Obviously not a good choice for SFA.

Our waitress checked the chocolate syrup for the chocolate milk and after she took our order, she checked with the chef on DS's order.  She let us know that the bun had egg, but since he is fine with baked egg he had a cheeseburger with fries.  It was also served with grapes and a small piece of corn on the cob.  One of the managers brought out DS's food and let us know the fries would take a little longer since the chef cooked them in the dedicated fryer to avoid egg cross-contaimation.  We did not have dessert.

Staff seemed very knowledgable.