I had AT&T fiber optic for 2 years and it never went down. It was always consistent, but they coudn't get the upload above 3 Mbps. I became a serious gamer in the last year and after they told me I couldn't use a different router I went to Charter. Its only been 2 months and Charter has lost service twice- one time for 13 hours. I heard Comcast was great but it's not in my area.