I order this a couple day ago and be still try to get it to work flawlessly . I buy it , of course , to help drive down my Comcast bill but lately it be be stay active for anywhere between 20 min to 4 hour . it be get better and with every call to Comcast i feel better that it be go to be a great modem . I be get a easy 36 mb down and 6 up which be a little better than what I pay for . I 'll update this as soon as I be confident the modem will become stable . 1\/8\/13 Update : it be not go to happen . I have call Comcast 6 time , different answer each time , I have move the modem to every free and splice line in my house , none work . it be honestly like the science experiment where if you check on the router -lrb- 192.168.100.1 -rrb- it crash . or if you do not check you get anywhere between 5 min to 4 hr of uptime but a crash be inevitable . I have read extensively on this and it seem like a botched firmware upgrade . I would avoid this modem for the time be if you be in the metro-atlanta area with comcast . I have read that people have have some success with the zoom brand or you could just get another Arris which be what I be consider