I initially purchase the Motorola sb6120 due to the high number of good review . about 10 % of the review do not work with comcast and I be part of that 10 % . the ubee ddm3513 modem to date have 1 bad review and be likely because of a single bad modem vs bad hardware decision like the Motorola . so I give the ubee ddm3513 a try and it just work . no problem . Comcast would occasionally disconnect -lrb- not the modem -rrb- and this device re-establish connection much faster than my older rent modem . I watch Hulu often and the connection would re-establish before Hulu would need to rebuffer . I know that the connection be lose because I be multi-tasking and search the web while watch Hulu . searching would freeze and I would notice the modem light show a disconnection but Hulu be still run . that be just amazing in my book