Originally posted by: Devistater
In looking for reviews, I noticed newegg has this for $20. So far thats the only reviews I've seen, if you count the customer reviews on newegg as reviews.
http://www.newegg.com/app/viewproductdesc.asp?description=33-164-005&DEPA=5
Newegg now has it for $12 AR, $2 shipping.
Regarding antennas and reviews... as long as the manufacturer doesn't outright lie about gain, they all work the same. If you already have a good signal, won't get any better. If you are using wireless for internet access, as long as your signal doesn't drop your internet speed won't change no matter what signal strength. If you are using wireless for data transfers (especially larger files) then signal strength and quality is essential, so high gain is mandatory.
If your WAP/router is at one end of the house, consider a directional panel antenna for the base. This not only boosts signal at other end of the house, it also attenuates signal behind the directional antenna, thus having a minor security benefit.
Most budget antennas have 4-8dbi gain. That's decent. Direct replacement antennas (not a stand-alone with cable) are available for pretty cheap, but those are near useless for a PCI card in a PC since mostly you need better placement, not higher gain. For the base unit you can raise it off the floor for better signal. Wireless signals don't like traveling through metal, so if your computer sits behind a metal filing cabinet, either move stuff around or get an antenna with enough cabling.
If your signal is really crap, you can get much higher gain antennas if you're willing to spend bucks. 9+dbi is available for around $25. 14+dbi probably around $45. Heck, you can get huge 24dbi dish antennas for around $100, give or take. At work we have these puppies pushing 7 miles, line of sight, with a decent signal. All these better antennas do not include cabling, so add $10-25. These are available at various retailers that specialize in the WISP market.