It was a great experience. The package I bought on Ctrip was a great deal, cheaper than buying it directly at the counter, and it even included a serving of takoyaki at the 58th-floor restaurant.
The scenery was also amazing. Highly recommended.
Very easy to purchase and time saving which was the most important because there can be a crowd buying tickets in person. After purchasing and setting up the train time to take for departures and seat number, they’ll give you a qrc code to scan at the ticket gate to get in. I suggest making the purchase first and then wait until you get to the ticket gate and complete the departure time and seat so you match the timing near your arrival.