If you were to log in, you'd be able to get more information on your fellow community member.
I've been using Vonage for over 6 months now and I really love it. I too had trouble with the switch over of my old POTS telephone number, but Vonage actually credited my SBC phone bill for the extra month I had to pay them so It didn't cost me anything extra. I found their customer service in this regard to be excellant. My sound quality is excellant. Perhaps you were not using their QOS (Quality of Service) functionality on their VOIP router? If you were having bandwith contention then that would explain the lower quality you began experiencing after a while. I would highly recommend Vonage to anyone that has been able to setup their own cable modem router or knows someone that can do that for them. Later, Chad