I haven't had legitimately good Chinese-style lamb since visiting to Inner Mongolia. This restaurant gave me serious throw-backs, in all the right ways.
It's sort of unfortunately located, but the food absolutely makes up for its location and questionable decor choices. Every lamb dish here is delicious, and why would you order anything else? I ordered the hand-made lamb noodle soup, and the lamb was just a perfect combination of fatty and meaty. The fried lamb was a bit too tough for my taste, but still, all in all, I haven't found lamb this good on this side of the Pacific.
As a side-note, the lamb tends to be quite odorous. I love it, but you may not be into that sort of thing. Your mileage may vary.