To be fair, in the outlets at SK3, I have never had to wait more than a couple of minutes to get served, the staff are (mostly) friendly and nearly always have a smile. My only complaint is that the burgers are sometimes kept in the hotbox for too long and the buns become hard. However, whenever this happens they always replace it with a friendly smile. So, in all honestly, I have no complaints.
I suspect that at half time when the world and his wife is wanting serving all at once that things might be different, but pre match I have no complaints. I don't bother at half time because I know there will be long queues that will take time to go down, that is the same at any and every event, lots of people all want serving in 15 minutes and as a result tempers get frayed. The staff are on a hiding to nowhere because there is no way they can serve that volume of people in that short a time.