I have to give this spot a low rating for their customer service.
They have run a few groupbuy vouchers in the past and are treating voucher holders as second class customers. Even if you want to eat at the SLM in the area in front of where they booth is they want to charge you $2 for a container. How much can these containers actually cost? Why discriminate against voucher holders and make them feel ripped off?
I have been there 10+ times before and now I won't be going back. There are so many more friendly options in SLM.