I buy this to bypass rent a modem from Comcast . and im guess most of you be try to do a similar activity . ive only have this go for a few day , so I can not say anything about the stability . but so far so good , im get speed above what I be quote by comcast , around 25-30 mbp , when im sign up for 15 mbp . I have to have a comcast tech come out and setup my internet connection , because the line have be disconnect . the tech that come out say that this modem do have trouble update the first time for some reason . and it would not update properly to the service . this be mention in someone negative review . luckily the tech be able to split the line , and connect one of he modem to the line along with mine -lrb- this one -rrb- . in about 2 min it be able to update properly and everything be work fine now . overall its not too expensive of a modem , in a year it will have be the same price as renting , but then I actually have something . and the tech also say that they be pretty good modem , they just have this little problem when you first update it or set it up for the service .