E.G.
I switched from Time Warner to ATT and LOVE IT!!!!
I do not have the down time I had with TW and the speed of my internet is so much faster. What I had discovered with TW was when they went from Comcast to TW they reduced everyone's internet speed. Unless you called to ensure you were a high speed customer they did not change it.
Also I have fiber (ATT U-verse) which is more reliable and faster but isn't available in all areas.
ATT's customer service is incredible too. If I experience any problems - which we were out for 30 minutes the other day with the storm they give you and immediate credit on your bill.
Hope this helps.