The main thing for me is it seems like the machine's are still too much of a hassle. Making sure the item is in the bag, that I do things in the correct order, etc. Half the times I've used one, I've needed help from an attendant. lol. And it's not like I'm technologically challenged. So, I just opt for the person. If I knew it would be a seamless process to use the machine, I wouldn't hesitate to use it, if I felt it would be faster. Patrick