The ticket redemption process was fast, so arrive on time if you don't want to wait for a time slot after other more deserving participants. The observation deck on the 87th floor and the skybridge on the 41st floor were overly rushed, limited to only 10 minutes, even though we weren't satisfied taking photos or exploring the facilities provided and were told to go down to the 83rd floor to take turns with the next group. Meanwhile, on the 83rd floor for souvenirs, the time was free (not plotted) to shop to your heart's content. Compare that to the Mahanakhon Skywalk in Bangkok, where you can truly enjoy the views and take photos from various angles, without fear of being chased or rushed.