The burger is 1000% worth the 3-5 hour wait on a Friday night. The trick is to get there as early as possible, put your name down, then go and grab drinks so by the time you finally get texted, you're appetite is ravenous. I've heard the wait isn't terrible during the day. They also opened up a bar in the basement to help with the overflow, they also sell food there but I advise against ordering so as to save room for the most delicious meats you'll ever have.
Surprisingly reasonable (if you don't order alcohol) There were three of us and we ordered the following:
Bone Marrow (served with a side of berry jam/beef cheek spread)
Chicken liver - a must, trust me
Burger WITH bacon and and egg (2)
We spent a total of $103 for 3 girls and it was mooore than enough food.