Received mine today. I can comfortably fit:

$5 in change
Cash
Ziploc bag with batteries
Sharpie
Surefire G2X Pro
Surefire keychain light (clipped to a zipper)
Two G17 magazines
Spyderco Tenacious
Gerber multi-tool
18-oz Kleen Kanteen
2x Cliff Bars
Bag of beef jerky
PHLster pocket IFAK w/ Celox, regular gauze, and H&H compression bandage
SOFT-T Wide flat-folded

The bag seems well-made, and zippers look to be YKK using paracord with a heat shrink as pulls. It's fairly small and difficult to over-fill, which is probably a good thing. The CCW compartment -- which I'm not using for that purpose -- has four zippers, one on each corner, so regardless of orientation one can grab a zipper. It comes with a small velcro holster that would probably fit a G19 without a WML. There's a velcro field on the top compartment for your patches and whatnot, should you choose to attach any. There is molle on the body side which would, I guess, allow it to be attached to a plate carrier as a hydration carrier. Overall it looks like any other sling bag to me.