Bittermens Boston Bittahs aims for citrus and chamomile flavors. I'm not sure what's so "Boston" about it. The chamomile, maybe? Chamomile -> Tea -> Boston Tea Party?
The aroma is nice but with gin, I wouldn't say the taste held up especially well. Maybe vodka would be better. I could try it in a Kangaroo (aka Vodka Martini) rather than the orange bitters I used last time.