I have generally found that you are better off to invest in a decent antenna rather than signal amplifiers. The antennas that come with most APs (including the LinkSys) have a +2dBi gain. You can go to anything up to +16dBi with a 100mw radio and still remain inside FCC EIRP guidelines. Keep in mind that decibels are a logarithmic scale, so roughly every increase of 3dB actually doubles your signal strength. A decent antenna can therefore give you significantly better reception and throughput. All that said, amps do work (albeit not as effectively as a good antenna) and make a fairly simple solution.