OK - I'm just going to put this out there because it seems really simple & is making a big difference for me.

I happened to see a chart online about the appropriate "fit" -- see image --- and realized the standard size mine came with might be too big - I ordered the smaller one, and lo & behold - the past few days I'm making about 3-4oz MORE per day than I was with the other size!!

DUH.

Also - little trick that I saw somewhere, use rubber bands to create a hands-free system with the double pump! I put a rubber band around each shield, hook it to the hook on my nursing bra or tank, and tuck the bottom of the shield into the bra or tank and voila! hands free!