Tried the shack burger today, as it was my first opportunity with lunchtime flight out of BOS. Usually I'm on the breakfast-time flights or intl.

Thought it was quite good. Maybe a tad over heated since half the cheese melted off and I had to scrape/peel it up off the tray/paper wrapper and put back on the burger... but the bun was heated nicely and separate toppings to build your own was nice.