have COMCAST service -lrb- in Washington DC -rrb- and order this modem to avoid pay the monthly fee for rent one . have work perfectly as far as I can tell . always get download speed in excess of 20mb per sec ... I do not use wireless router , which may slow it down ? get 's slightly warm , but not hot . I use these review a lot when buy thing so I figure that I would write a review for once . Have have it about a month , no problem .