Only 2 problems.....
In some PC games the rumble feature doesn't work correctly, meaning either it doesn't work at all or it rubles continuously.
The second problem is the driver issue. Every time I restart the computer I have to go to the device manager and enaable then disable the HID (Human Input Device) to get the adapter recognized. Otherwise it gives a Code 10 Device cannot start error.
I just tested WinKawaks and it works fine for me.
Aside from those annoyances I've been very happy with the adapter. Especially since I've heard other types have produced latency problems.