Ah, I was sure we had a thread on this place. Or rather, this mini chain.
I ate at the one on Lex and 30-something (Affinia Hotel) yesterday, following an appointment nearby. It was fairly early, 12:30ish, and there were not yet many other lunchers, so they were not precooking burgers, or at least not starting them before orders were in. Mine -- the "Artisanal" (so named because that's where they say they get the cheese for it):
- 9-ounce burger of ground flank steak
- Manchego
- bacon (3 or 4 full strips, well-cooked
- caramelized (whole) shallots
- sliced avocado
- standard slices of tomato and white onion, and half leaf-lettuce leaf
- brioche bun
Came with standard two pickle spears and the truffle-Parmesan fries (which made it a pretty good value).
I could not put everything on the burger (it would have squirted halfway across the room, and anyway, I would never put raw onion on), and so ate bites of burger with separate bites of avocado and shallot. Taken all together and separately, yes, it was a good burger, although all-flank-steak can use a tad more moisture. Big, though, and cooked as ordered.
I have to disagree with Daniel on the truffle fries, though.

I probably should have asked to sub plain, or at least with only Parmesan, since truffle oil does not add anything great. Not terrible, but not a necessary addition. In any case, they would have been much better if they'd been hot. For shame that they seemed room temp.

What good is any fry if it is not served hot?
But I ate all (except the raw onion). And then kept falling asleep at my desk the rest of the day. Well, maybe the Hendrick's I had before the burger contributed to that.