after Comcast jack up the rate on the modem rental by more than 40 % I purchase the cm100 . the Linksys cm100 be easy to install and I have have no problem since the initial setup . the modem provide by Comcast have to be reset every few week . I have not have to reset the cm100 in more than a month . get out from under the Cable company thumb and buy you own cable modem . it only take a short call to you cable provider and a few month and this product will pay for it be self . you will not regret this purchase !