I just get this modem from Amazon . I buy it to replace my aging Linksys modem . I do a few speedtest.net check before I unhook the linksy and I be get 15.7 mbp down and 4.7 mbp upload . that be acceptable even though my neighbor with the same comcast internet as I have be get 33 down and 9 up with a comcast modem . I hook up this Motorola modem and I be sad to report now I be get 8mbp upload and 34mpb upload ! the upload go through the roof but I dont upload a ton of stuff the download go down by 50 % . I want it the other way around -lrb- like my neighbor have -rrb- . I may have to return this modem as this be not acceptable .