I replace my Motorola SB5100 modem -lrb- which be almost 4 year old -rrb- with this Linksys . I have to get a modem for my mom , so I buy a new one and give she the old one . that be the only reason for I purchase a new modem . I choose this one because it have the best rating . honestly though , I do not really notice a improvement in performance . I have cox high speed service at 9 mbp download speed . maybe this new modem be faster , or even slower , but I do not notice it . I do lot of multitask online and play some game online with Xbox Live . ohh well ... as long as it work at least as well as with the older modem I be happy ! : - -rrb-