It does work, signal is not the best, but its acceptable.
Using it for about a week, had no problems so far.
Windows does not detect the driver automatically, it needs to be installed from the CD.
When installing, there is option for driver only or driver including their SW.
Have not noticed any compatibility issue.
Just for curiosity, tried on windows RT tablet, didnt detect the drivers as expected.
Some other wifi dongles worked on it, this one does not.
Might buy more in future, so far im happy.