We purchased our tickets online in advance and then arrived at 7:50 am on a Tuesday. There were just 20 people ahead of us in line. Because we had dressed and packed light, we breezed through security and then bypassed the line for ticket sales, making us the first guests to arrive on the deck! Such an incredible experience to see the city wake up from high above! The staff was extremely friendly and personable. Loved our experience! I’ve heard the lines are ordinarily pretty long and tiresome, so I recommend getting there first thing in the morning!