just get the sb6021 today and spend a half hour with comcast try to get it to work properly . it keep drop the signal . Comcast tech seem quite knowledgable and say she work with this model `` all the time . '' she sound sincere . my older sb6020 lose the blue linked light and be very slow at time ... still work but erratic speed . so far , this one be very fast at time , and again , kind of diddly like old dial-up day at time . -lrb- Comcast or the bandwidth in general may have some part in this -rrb- . at least all the light be on . I have Comcast blast , the best I can get here . the download be in the 25-30 range as expect , but the upload be 7-8 , supposedly in the 80 % high range . the Receive be `` bond . '' the send be not . apparently bond be fast ... so I ask how to get send bond too , but do not get a answer I could understand . be it my comp 's fault ... with its 8 gig RAM and AMD Quadcore ? Dunno ! no virus ; not fragmented . that upload be a royal pain ... too slow . if anybody here have any suggestion or explanation -lrb- in plain English -rrb- , please let I know . : -rrb- and why be this model almost $ 40 cheaper than the older sb6020 ? probably because this have only a one year warrantee , while the older sb6020 have 2 yr . the old one drop the link light just 3 mo . after the warrantee expire . it be still work , but erratic on speed . the paper insert with this model mention the warrantee , but I have to talk to a Motorola rep to find out that the length be only one year on this model . `` why , '' I ask . because that be `` industry standard . '' hah ! `` do not you want buyer to think that you product be better ... that you have ` faith ' in it with a 2 yr warrantee ? '' I ask . ca not quote the gobble-de-gook I get back . LOL as far as the heat other have mention . Yeh . it be hot at the top ... will not burn you , but it be definitely hot . there seem to be good ventilation -lrb- lot of hole all over -rrb- , so maybe the one year warrantee be reflective of the possible earlier demise of this newer `` faster '' version . Hope not . my first surfboard I have from Motorola , be still work after 5 year ! I only replace it to get the faster doc-si 3 for the speed . oh well , Motorola Motorola ... what be happen to you ? be the technology run too fast for you ? be the bandwidth get overload ? I do not know the answer , but do know that the name Motorola be not what it use to be .