I have a D-Link dcm-202 that I get from best buy about five year ago . the D-Link be great till about 6 month ago when I notice it start freezing on I . I have to unplug it , then plug it back in to get it go again , and Netflix on the Apple TV start have issue . when the Motorola sb6121 come in I call my service provider to give they the MAC ID # print on the modem , instruction , and on the box , then hook it up and do . it have be run for about a week now and I have not have any issue with it and Netflix be streaming perfectly . and the modem do not seam to get hotter than any other small electronic device .