The overall experience was awesome, except for the first time we had to exchange the ticket. First, why the need for the print out tickets? It's 2018 and the committee had barcode scanners anyway.
Second, took us 10 mins to have the tickets printed out. Not the queue, the printing out process. It was quicker for us to print out train tickets and prambanan entrance tickets.
Oh and why are the exit doors so small? A long queue..every..time.