I purchase the Motorola sb6121 because we be move and change cable company . the day that the cable installer set up the connection to the house , I have leave the modem behind at the hotel where I be stay before the mover arrive with we household goods . later that day , I hook up the modem and find it to be very easy to do . I connect it to my laptop that I have with I and it work like a charm . once the household goods arrive and I be able to set up my desktop Lenovo computer , connection to the modem be again easy . I run a speed test and the modem deliver every bit of the megabyte that the cable company say we connection should produce . for price and ease of use , this be a good buy .