I have Optimum voice in my house, not a complaint out of me. The only difference I can tell from when I had Verizon is the bill.
My fax machine works flawlessly and the voice quality is good.
The only thing I didn't care for is the fact that if your power goes out so does your dial tone, to prevent this I have a UPS installed for the cable modem and my wireless router, so when the lights go out I can still be on my laptop surfing the web and talking on the phone, all by candle-light.
