I never go near it - I think in four years going regularly I've had two pints of Chang. Firstly, my bladder is the size of a walnut and I already desperately need the bog by half time.
Secondly, it's ridiculously expensive. If I'm going with my little sister - who is fifteen - then we raid the B&M on County Rd beforehand where a Twix is 29p. If I want a proper feeding then it's on early to the Wetherspoons for a burger and pint, about £5.
So, to summarise, yeah it's ridiculously expensive but then the queues are long enough anyway so they don't need to bring it all down.