i will admit that the wifi signal is not the best i have seen. for example my macbook has full bars my 9900 has 1 (only the . is colored white) and i'm sitting 15 feet away from my router.
My 9900 shows a solid 3/4 bars when I'm upstairs (router downstairs) and easily more than 15 ft away. When downstairs I get full wifi strength no matter how far I am in the house. I have the Netgear WNDR3700 router btw.