Thanks, cap! I tried both on with my items and without my items. I think the GM is great, too, and what I was originally going to purchase but I did have to cross the straps to get it to stay on and the outer strap still kept wanting a slip a little; however, I am pear-shaped so my hips are always the widest part of my body and that's right where the base of the GM was hitting which I think was helping to force it off of my shoulder. If you're petite and more of a "straight line" the GM should be great for you! The GM wasn't comfortable for me the instant I put it on, so if you tried and it and it felt good you shouldn't have any problems and I think you made a great choice 
The MM also happened to be almost the same size as the Prada I was carrying which has been a great everyday size for me so that contributed to my decision. If I just love it, I may be tempted to get a GM, too, for travel!

The MM also happened to be almost the same size as the Prada I was carrying which has been a great everyday size for me so that contributed to my decision. If I just love it, I may be tempted to get a GM, too, for travel!