Comcast has delivered for me!
I switched to the all in one solution with Comcast and now have phone, cable, and ISP on one bill, saving about $200 and quite happy. I work full-time from home and I am on computer several hours per day - wireless 100%!
On many days my daughter is on her desk top upstairs wireless, my wife is on her lap top wireless in the den and I am on my lap top wireless in my office with no bog down or slow down. I have had zero down time and excellent customer service getting my wireless network set up. I guess you can tell I am sold on them :)