I've eaten a few times over at b.good at the Dartmouth Street location now. It's basically next to Back Bay Station, which is where I get off the commuter rail, so it's very convenient for me to get lunch there.
The good parts:
I really appreciate their commitment to small farmers. Their potatoes come from Iowa, but their meat and vegetables are coming from New England. They grind the hamburg, cut the chicken breasts, and form their veggie patties in-house.
b.good has a low-carb option, wherein you can get extra vegetables (broccoli, carrots, and red peppers) instead of a bun for $1.29 extra. If I wanted to, I could get a gluten-free bun. I'm thinking of trying that next time.
The food is absolutely delicious. Evan thinks they use too much salt, but since I really like salt, this doesn't bother me.
The not-so-great parts:
I asked where they get their "local" ice cream, and the server didn't know. Why not proclaim where they get that from? MA has lots of great ice cream, so I was very puzzled as to why I couldn't get a simple answer to a simple question.
Their drinks are distributed by Coca-Cola. With all of their focus on healthy, local food, you'd think that they'd steer away from the normal soda fountain fare. There are so many kinds of sodas that don't have HFCS in them; why not choose some of them?
I do plan on sending my concerns to them, and hope that I can get a reasonable answer. Still, as far as fast food places go, this place isn't bad.