Easy set up . Works well with Charter Cable . the installer come in , run the cable provision the modem and it be do . nothing for I to `` configure '' or fiddle with . since then it `` just work '' the way it be suppose to . use the modem for Charter 's 30M down , 4m up service level . the only thing I miss -lrb- vs. my old dsl modem -rrb- be a activity light that blink in sync with the traffic that be actually pass through . the 6121 have a activity light that just flash at a constant speed , all the time . the real activity light give I a sense of what be happen on the network connection - but now with 5x faster speed , maybe that will not be a concern . bottom line , I recommend this product .