I use both too. I think Stowaway makes the best bags! They don't bounce and there's a ton of space. I love the easy access to water bottles in my cantle bag. I use those zippered pockets for my emergency stuff like vetwrap, gauze pads, bute, clean washcloth, Betadine swabs, wet wipes, etc. I put my stuff I use on every ride in my pommel bag because it's easier to reach like granola bars/snacks, extra water, collapsible dog bowl, gps, compass, tissues, chapstick. It's amazing how much you can fit!