Bought one of these when I decided to upgrade my Acer One netbook with a bigger harddive and an extra 1GB ram. Simply took out the old card (802.11g), slotted in the new and installed the latest driver (from the Intel website). Booted up and configured the wireless network (have the BT Home Hub 2) and that's it. Works perfectly, no drop outs and a strong signal right down the bottom of the garden.
A worthwhile update for little money.