You can't eat this stuff standing up... your knees will buckle!
Seriously - sit down first!
The brisket is life changing, so be sure to try that first. They'll likely hand you a piece when you walk in - be sure to have a taste. Please do yourself a favor and don't get the LEAN brisket. What's the point? That's like ordering decaf coffee.
I've been here twice, and I think it was even better the second time around. This time we were smart enough to get in line at 10AM instead of waiting until noon. We still had to wait an hour until they opened at 11, but we were eating by 11:05.
This is a must-visit when you're in the Phoenix area. Just remember to get there early!