Premium economy can be a spacious and relatively luxurious way to fly long-haul. Or it can be a pinched and overpriced experience that leaves you feeling ripped off. So how much extra do you have to pay, and what do you really get for your money? When we polled industry experts, Virgin Atlantic and Air New Zealand were named as the best for premium economy, while British Airways and Air France’s offerings were said to be tired and in need…