I purchased 2 vouchers and redeemed them in separate visits. Both times the attendant tried to tell me that the boss is not around and she doesn't know what to do with the voucher. On the first visit, I basically told her I don't want to come back again when her boss is around, and explained to her in detail how the voucher works. On the second visit, I was not as courteous and told her straight in her face that she has already used the same trick on me last time. She then grabbed another co-worker who was rather ill-mannered in telling me that they're not making any money on voucher redemption. At the end, they did allow me to redeem on both visits, but not without some wasted negotiations. The dumplings themselves tasted OK. We'd much prefer thinner dumpling skin though.