Holy cow...I just set up 2 of the 3 extenders on my 2 desktop computers downstairs. They're hardwired to the desktops, but I've gone from very low signal strength and 1-5 Mbps speeds at times all the way up to full strength and 54 Mbps.
Now I'm downloading the DD-WRT...
DD-WRT is awesome. Just because not to set your wireless strength to high. I found that out the hard way and burnt out a router