Much better coverage than a normal/standard, "range max" wifi stick I tried.
On a recent holiday, when the hotel's wifi failed, I used it to connect to a free wifi service from a local cafe, quite some distance away, from within the hotel. Ideal unit for low coverage areas / back-up holiday use when signal quality may be unknown / very variable. Only slight downside is connection by USB wire - but this allows you to place it outside the window if necessary (though an external antenna would be better for this).