I just install the modem today -lrb- take Comcast 1-3\/4 hour to provision -rrb- and be satisfied thus far . the modem have not link up completely after be connect for 80 minute . it be use , however , and I will return if it do not link up by tomorrow at this time . I be get same download and upload speed , relatively as with Comcast Cisco Modem , but the ping rate be much higher , which be a concern .  Arris WBM760A Touchstone DOCSIS 3.0 Cable Modem  I understand the item be use , but it should have include those item . I just edit this review after learn what should have be include . after communicate with seller today , 6\/11\/12 , I decide to expand my review . seller offer I a 50 % discount if I would remove my negative feedback . I agree , but Seller would not issue credit until I do so . please note : additionally , item be not receive in `` very good '' condition , it be scractch and bang up . it also do not include a back-up battery , as Seller indicate to I . I understand I can return the modem for a full refund , but it be quite a undertaking to provision , and I can not afford to be without internet access . I make the choice to purchase from this seller , base on the positive percentage , so I must accept the consequence of that decision . however , I would not recommend buy from this seller .