Even a lot of enterprise stuff... total crap.
I've been dealing with a lot of friends lately with Wireless gear that just dies.
It all turns out to be Cisco crap. Or Linksys (owned by Cisco) stuff.
I mean they are paying a couple hundred dollars and then they are charging $70 for support per hour to fix something they can't... and end up charging them to tell people its broken.
A lot of Wireless antenna and transmitters are badly tuned to each other, the transmitter then blows itself up or goes all whacky and its power factor efficiency goes to the sub 5% arena... meaning you have to be 3 or less feet from it to get any signal.
Just stay away from it. They last stuff I used was the WRTG54S and even that was flaky, it was still a good linksys design, but re-designed by Cisco and cheapened up to the point it had less RAM and processor that its previous incarnation.