I be not one to write review but I decide to write one on the sb6121 . it be super easy to install and work a lot better than the $ 7 a month modem I be lease from the cable company . I actually call a techie at the cable company about install my own modem and he tell I this one be a great modem to purchase . after extensively research cable modem -lrb- I conduct hour of research on all electronic goods I purchase -rrb- I be glad to say I make the right choice in purchase this model . if you be think about get this modem , please do .