this cable modem work great with my Comcast service in the Bay Area . I have blast service which be advertise to provide 30 mbp download speed , and I get over 30 mbp with this modem connect to my 4 year old laptop when I perform a speedtest on the comcast website . it also show over 6mbp of upload speed . keep in mind that this be the case when I connect the router directly to the laptop with a ethernet cable . if you attach a wireless router it will most likely not give you the same result but that be due to the wireless router . I get over 20 mbp with the linksy e3200 wireless router which I buy to complement this cable modem and I would recommend the Linksys e3200 if you be look for a fast dual-band wireless router to pair up with this modem . as for the installation , it could not have be easier for I . Comcast have originally rent I this same modem for 7 month -lrb- $ 49 I throw away in rent -rrb- so when the new modem arrive , I simply disconnect the old ubee modem and plug in the new uBee Docsis 3.0 Cable Modem . when I turn on my firefox internet browser it divert I to the comcast installation page where I follow the step -lrb- you need you account number -rrb- and within a few minute it detect the new modem and I have internet ! simple as that , no need to call comcast in my case or look for any MAC address . keep in mind that this be probably the case because I be rent the same exact ubee cable modem , but if you do need to call Comcast , the MAC address be easily accessible on the bottom of the cable modem . now 3 month after I buy the modem I have save $ 21 and I be happily continue to save with little to no issue in connectivity !