My girlfriends took me here for the first time last night and I was impressed.
We went around 10pm and we were promptly greeted by a friendly staff member. She handed us a menu before we stood in line. The line wasn't long and it didn't take long at all. I got a Shack Burger (single, no cheese) and fries. The burger was well seasoned and the vegetables were crisp. The atmosphere is modern and fun. The staff was very friendly and diligent. There was one member who was busing the dining room by the restrooms and he was extremely nice. He kept our table clean and even refilled our waters. I wish I knew his name for this review...but anyways yay for Shake Shack.