Excuse the poor quality blackberry pic but I had to show you just how XL this bag really is...
Yeah, it's huge. But I didn't have any trouble carrying it on (I had a back up plan just in case) and it would make the perfect double as an overnight bag, which is will do during my upcoming Indiana/Kentucky trip. I promised a pic so I had to follow through. If you're interested in getting one yourself check out the site, I think they're still on sale.