I used to have my home phone through AT&T but I kept on having crackling sounds/connection problems so I switched over to Comcast voice. I already have comcast internet and cable. I also used to pay for call waiting every month with AT&T. Now I get free caller ID, call waiting and several other features and I'm paying less than I did per month with my old AT&T service. I get so many survey and other bothersome calls that it's great to be able to see who's calling you before you decide to answer the phone. Some of these calls happen as late as 9pm or even later. I can also see what calls I've missed during the day if the person didn't leave a message. Now that I have caller ID, things are much better.