We have been upgraded at check-in before but we already had been allocated an inside cabin and so were delighted to be moved to a balcony. The problem is, of course, that the longer we wait (now 8 days) the more the expectation is for an upgrade which is definitely NOT a possibility. Every time I think we might make a balcony, or even the Grills (!) I have to give myself a mental slap and tell my self - it's an inside cabin, it's an inside cabin.......🤣🤣