I really liked the Boston Tea Party for its vegan friendly options and comfort factor. I spent many hours here over the weekend sipping Jasmine Green Tea (1.60 if you eat in) and also ordering a jacket potato with roasted vegetables and no butter (about 3.25). My jacket potato was large and delicious. There were many other things I could have ordered, including a vegetarian breakfast. The breakfast included eggs but the staff are willing to make substitutions.
The bakery case also included gluten free vegan options which looked quite good. There was also a cold section with gluten free vegan options as well.
The upper floor is really nice to sit in, as it is very large with high ceilings, comfortable couches, and lots of seating. There is a bookcase with books you can take and keep if you'd like, which I definitely took advantage of, as well as newspapers and magazines that made their way around the room.
I would definitely recommend coming here for breakfast or lunch or coffee/tea.