I have never in all of my 17 years in Las Vegas been treated with the amount of disrespect and abuse that occurred tonight. Our family will NEVER come back to this restaurant. We normally go to another sushi restaurant and we should have stuck with our regular place.... Here is what occurred... 4 people ordered sushi and 1 person ordered a bento box. The sushi came out and 20 mins later, after we were almost completely through with our meal, the bento box finally arrived. We mentioned it twice to the server. He was very nice and apologized but said there was nothing he could do because the kitchen was behind. We asked to speak to a manager. We started by complimenting the quality of the food and Dylan our server. But we told her how unsatisfactory it was that the person in our party was sitting with no food for the majority of the meal. Just watching everyone else eat is not fun. She apologized and said that should never have happened and she hoped it would be better next time. She then offered free dessert for the whole party of 5. My grandmother was getting tired and we needed to get her home so we thanked her for that offer but asked instead just to have the bento box taken off the bill. It was as if a switch in her was flipped. She turned into a monster for lack of a better word. The rest of the conversation was nothing short of embarrassing at that point. (For her not for us.) She loudly told us that she was the owner and she would not adjust the bill. To quote her, "Did you eat the bento box?" Yes he ate it. He was starving by the time it came. Then she said, "I have chefs to pay and they make more than $10/hr so I can't be taking food off the bill that you ate." Huh? So you were going to comp dessert for 5 people but you won't credit $18 for a bento box??? For the OWNER to treat customers in such an abusive manner is ridiculous. We weren't a young rowdy group. We were there with our parents and grandmother. We were customers that deserved to be treated with respect. I insisted at that point that she take the money off the bill and she finally did after arguing and mocking me in front of other customers. When she looked at the bill and saw that we had a Groupon, she turned around and loudly said, "You have a Groupon and you're trying to get something for free?" That is not the point at all. A Groupon does not mean that we shouldn't get the same quality of service as someone else. And obviously the business is looking for new customers or they would not have offered a Groupon. She then came back and literally threw the bill down on the counter in front of me and told us, "I hope you never come back here again." No worries there. And just for the record, Dylan was fantastic and we tipped him 20% in cash on the entire amount of the bill, including the full amount of the Groupon. So the owner cannot say that we were trying to be cheap. We were disgusted to say the least by the owner's behavior.