I bought this because I thought my wife's laptop had a problem with the internal Wi-Fi card (even after the upgrade on wireless gigabit excruciatingly slow to boot connections). It was actually faster than their card, but there's another issue with the laptop. I checked my laptop with a fast wifi card and it was a bit slower. But I think that's to be expected since the integrated card has a large antenna. That was more than enough to stream HD video to my modem/router at gigabit speeds. An internal card with a larger antenna loads slightly faster.
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