this modem have be all that I want it to be . I have a fairly extensive network as home network go and it have be rock solid with this modem . I get this to replace a 6120 that I have for year but it just be not handle the load anymore . the 6121 have give I no problem whatsoever . I also love the fact that it be about 1\/2 the size of the 6120 . live in a condo , where space be at a premium , every little bit help . speed have be consistently test above the rate that I be pay for , even when use my wireless connection . Gotta love Docsis 3.0 .