"GBK staff are friendly, our food arrived promptly and it was tasty. But it's close to £20 per head for a drink, burger and fries. There was no queue to get in, but a near 20 minute wait to place you order. You have to rejoin the queue to refresh or order additional drinks. We spent 20 minutes eating, 15 minutes waiting for food and about 35 minutes in queues! I'd get the advantage of this model if the food were reasonably priced, but it's not. There are numerous alternatives to GBK, I won't be hurrying back."