I update my Motorola modem from DOCSIS 2.0 to a Motorola DOCSIS 3.0 . I have do some research on different brand and docsis 2 vs 3 , and be please with the product . I have a very noticeable improvement immediately in download speed via Cox cable . the modem be easy to install and get update the log into the cox record -lrb- by call cox -rrb- . it get slightly warm , but probably less than my old one - as it have better ventilation hole . it be deliver in just a few day - faster than expect .