The food is worth EVERY MINUTE of waiting in the line that frequently wraps around the building. I've been to Gaucho for both lunch and dinner; both were equally out-of-this-world.
The lunch portions are just right. I had the ribeye served mediun and it was excellent. I love the appeal of the wooden plates. I tried the Argentino salad for dinner, which is essentially Argentina meets Yinzer, as it is a salad with steak, avocado and papas. I plan on visiting again with a group to experience the paella (PS: great double-date idea) and to take advantage of their BYOB policy!