I've been agonizing about getting buying an Ali for the past couple weeks. In most of the pics, she seems to be quite large in proportion to the wearer. I am about 5'1", 130lbs. Right now, I'm rockin' the small ergo hobo and it fits pretty well, but maybe a bit small. I just don't want to buy a bag off eBay that I will not use! And yes, I've been checking various threads for size comparisons, but it's hard to tell w/ some posters about their sizes. Any thoughts?