I have a 12-disc Innova bag. For awhile I carried it on, that was no problem going through security, but it got to be a pain carrying it around while changing planes in big airports like ATL. So I started checking it, and again - and I'm afraid to write this for fear of jinxing myself - that hasn't been a problem either. Though I do keep a list of exactly what I have in my bag, should I ever need to replace it. When airlines started charging for luggage, rather than check two bags (a suitcase and the DG bag) I just take a bigger suitcase, put the full DG bag in there.