I have the Galliera Pm and find I need to take it off my arm to get things out, that isn't as convenient when you have a baby on your hip....whereas the monty you could get in and out easily, and it's less cumbersome that the big GM, also everything gets kind of squished together in the Galliera and it is hard to find things, I love mine and think it's beautiful but it's not totally practical, I think the Monty GM (it's on my list now =))