read the review on Amazon , I decide against the Netgear product . apparently in DOCSIS cable modem , the manufacturer be not the one who control the firmware , it be the cable service provider . even be very comfortable muck with these device , I decide to go with the Motorol sb6121 as I didnt want to spend lot of time install the Netgear modem . issue find when use this with Comcast : -lrb- 1 -rrb- this device do not pick the dn and route information automatically while get a IP address . due to this , I have to manually enter this information in the Netgear Wireless Router that I use currently . -lrb- 2 -rrb- this device do not work flawlessly with a Mac . it take I a while to figure it out after read doc on the internet . its difficult to browse the web and trouble-shoot when the internet connection be down ! it work now , but every now and then when the dynamic ip-address expire , I have to poke around and get the internet to work again . Comcast technical support over the phone will not help if the device get and ip-address . they do not care if the route and dn information be not get set . this Motorola model be certify by Comcast - strange ! Comcast support recommend I get a professional to come and look at the problem and pay more than the cost of this modem if its not a Comcast issue .