Good deal BUT I have only seen this thing in the air a few times... and never when I was in DS and I am there a lot as I mostly eat there. Good thing is Groupon will give you a credit.
Personally I would like to be able to some day... Maybe I am just there the wrong time of year...
I did see people in the ticket booth a few times.
If I recall I have seen it in the air mostly in the morning and on the early side for DS.... I would say plan breakfast at DS.
Thank you for posting this!! I just bought one for our trip in June. I tried the DEAL10 and it said it was no longer valid, but then offered me a different discount. So my groupon for 2 people ended up being $18.40. Still a good deal!!