I order this so I do not have to rent a modem from Comcast . I have have it run for a few week at this point , and it be be work very well with no hiccup at all . at first I have some trouble set the modem up , but then I discover that Comcast 's activation portal be not properly load on my 4-year old MacBook , but it work quickly and painlessly as soon as I plug it into my 4-month old Windows machine . since I activate it , everything have run smoothly .