This adapter does exactly what it claims! I have a relatively new laptop with a built-in 100 MB network card, but internet speed well above that. The laptop also has a USB 3.0 port and I'm now using that with this adapter successfully. It was very much plug 'n play; I didn't even notice any drivers loading the first time I plugged it in (using Windows 10). The adapter does seem to run a little warm but it is has been used almost every day for several weeks now and has worked absolutely perfectly. I definitely recommend this adapter to anyone with the need to create an ethernet port using a USB port (particularly creating a Gigabit ethernet port using a USB 3.0 port!).