Convenience of booking with Klook: Excellent, just scan the QR code and you're good to go.
Facilities: Lots of things to do inside, new and clean, kids loved it.
Service: A staff member told me to buy a night admission ticket because it was cheaper, but after waiting for 45 minutes, I found out that the voucher couldn't be used during the Easter period. They also told me to scan the code 10 minutes in advance, but didn't mention it wouldn't work, which wasted over half an hour of my time. In the end, I had to buy a full-day ticket at the original price.