Comcast internet have get horrible the past few month . I have be mean to call , then get a letter say I need to upgrade to a DOCSIS 3 modem so purchase this one because it be a fully support model by Comcast . internet be still intermittent at time but at least I be able to use my VOIP phone again . I still need to call Comcast - I do not think the problem be between I and the headend . the modem be about what I expect . nice appearance and size . do not get too hot . my only complaint be the blinking of the light on the front panel . once connect the only light that blink be the Ethernet light which blink steady to show any ethernet activity instead of on and off with the actual activity . my old Linksys modem blink the Ethernet and -lrb- cable -rrb- activity lead 's with activity so you have a better idea what it be do which be somewhat useful especially with sucky Comcast .