I too be hit by a monthly modem rental fee all of a sudden by Comcast , so rather than pay they more , I order this modem to replace a lower model surfboard . it arrive very quickly , as usual . I disconnect the old one , connect this one , call Comcast and literally 3 minute later I be up and run again . it be work perfectly since . another reviewer note that it run hot , and that be true , but do not seem to be a problem .