I bought this adapter, as I have on my Ultrabook no LAN connection, only Wi-Fi. Because to me, however, was too slow to access a NAS, I've bought the adapter, USB3.0 course, otherwise no data rates in the range Gigabit would be possible. I am very pleased with Up and Download far. These are absolutely in the area from what I had imagined. Another advantage is that this hardware for both Windows and Mac. I have tested it on both systems and it works beautifully.