Summary: Total piece of crap. Mechanical design is frail at best. Unpack-aged mine and it immediately broke when I unfolded the USB connector. I was able to connect it to my laptop using a USB3 port, only realized 177 Mbs speed at 10 foot distance to a Buffalo 802.11AC wireless router (WZR-1750DHPD).
Summary: if noticed that vertically all generic 11AC USB addon's to date state up to 800+ speeds without making it clear that Only 11AC adaptors with a USB3 interface can actually reach these speeds. I'd like to see dabs provide a clear and bold this product is using a USB2.