Their internet and phone lines are separate. So even if internet goes down, you still have phone service.
No more long distance charges.
The modems have an 8 hour battery back up. So if the power goes down, you can make phone calls for hours.
The only thing that bites is that they can't put my business and home phone on the same line with separate rings like I have now. And I need those separate rings to let me know if it's a personal call or business call. So I'll have to buy a second phone for the second line. I only use light weight headset phones (no cradle) and those start at about $60. But I'll save that much in just a few months.