Summary: Had issues with driver and Yosemite. Had to delete all associated files and install latest mac driver 2.3.1. D-Link tech support was very helpful (ID# AR004214) Case# c6671145. Works perfectly now, even over USB 2.
Pros: Fast AC connection with Airport Extreme. Configurable network interface.
Cons: bulky cumbersome usb interface, delicate... I plug device with a 3" USB extension cable to keep from breaking it or tweaking my mac's USB port.
Pros: This adapter works a lot better than the Belkin Network adapter that I previously had. (You'd think a Belkin adapter would work with a Belkin router without any flaws but it refused to keep a steady connection.) I definitely get the speeds that my router provides.
Summary: Item works great, but I dinged two stars because the software is NOT required to run this device, and in my case caused problems. The instructions say to insert the CD before connecting the device, which I did, but the software kept causing my computer to hang, and the network connection would not...
Summary: I bought this to be able to up the speed of my wireless network adapter from 50 Mbps to 100 Mbps and this did the trick along with a new router. All you need to use this and to be able to get its full speed is a USB3 port on your desktop or notebook.
Might work for some, but NG on Lenovo Y500 gaming computer with Win 8.1.
12 February 2015
Summary: The router I got for use this with, also by D-Link, works fine. But this piece trashed my Lenovo Y500 gaming computer with a BSOD. Couldn't uninstall the software, couldn't delete the files. Had to go into Safe Mode, delete the files manually, and do a system restore from that mode.