I order a Motorola sb6121 surfboard docso 3.0 Cable Modem to use with Comcast in Oregon . the modem have have no problem since I have acquire it . it be easy to use , compatible with Comcast , and work . the led be shaped and colour-coded , add to its usability . I be able to get high speed -lrb- over 20 mb -rrb- use this modem , though that have more to do with Comcast than it do with the modem itself . I have be use this modem for approximately a month ; so far I be completely satisfy with my purchase .