Two-story house with wireless router (Netgear) downstairs at one end of
the house with normal antenna orientation (vertical). Wi-Fi PC card
(Netgear) has trouble connecting when upstairs. But Airport Express has
no problem connecting and maintaining that connection upstairs, even at
the other end of the house. Highly recommended.
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Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>
Another kudo for Apple Airport Express 
Linear Mode
