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.
Absolutely convenient compare to last year. You can directly booked the seats online without having to go to the counter or machine to exchange and choose seats. Price wise it is definitely cheaper than buying on the spot. Better plan and buy these tickets earlier.