The queue is a bit long. When I gave the voucher, the lady said many times I couldn't scan the barcode... Even though everywhere I gave the voucher, I could scan it right away. In fact, I asked the person who registered me to come there and hand over his cellphone. Yes not possible. Luckily the other one was quick to respond. Scan using another cellphone can. Hadeeh. Then the result was not sent by email but was told to come back again in 2 hours. Less efficient in my opinion.