My Retroflag case arrived today. I like it, aside from the redundant "CASE" and wordy "...FOR ALL OF US".
The mounting screws are a bit large for the holes in my Pi 3's pcb, necessitating a bit more careful force than I would have liked, but otherwise, the assembly went smoothly.
The power button looks like it's a simple make/break feed to pins 4 and 6, possibly with the reset button inline, so it doesn't automatically shut down or anything like that.
All 4 USB ports work from the single Pi port, which implies that it's a hub. I didn't test the network port since I'm using wireless.
Not much else to say about it, except that I wish I had grabbed a couple extras.