We were just there a few weeks ago. As others have said, they only have drinks and 2 food items - one is a charcuterie board and one is chips and dip. Both are on the exotic side so FYI if you have picky eaters. Check out the menu online. You have a 45 minute time limit and the seating is varied (bar, standing tables, booths). We were a party of 5 with 3 kids so luckily, they sat us at a booth. The standing areas look pretty uncomfortable especially with kids.
It was really cool being in the cantina, but I can't say we're in any rush to do it again. The kids liked the fizzy drinks they got, but they were really top heavy and I basically had to hold it for my 5 year old as she wouldn't have spilt it very easily. If you are looking for a meal, this isn't the place to go and I wouldn't bring outside food in either. Not sure that would fly and I would either just plan to eat before or after. It's really meant to be a place to grab a quick drink, and that's it.