"Service is reliable consistent very good voice quality."4.0 starson by pat2joy
Pros: Cost, voice quality (depends of quality of phones used), reliable
Cons: Subject to quality of Internet service provider and data rate provided, as well as quality of phones used. No phone service in a power outage.
Summary: Contrary to all the negative remarks made in this cnet review. I have been a user since Vonage's early days. You can not beat the cost for both domestic and access to foreign telephone systems. My mother who lives in my home uses it everyday to call France and the Bill is still only 24.99 a month + tax. Vonage is only as reliable as the internet connection you have which is not Vonage's fault it that part does not go well. I am lucky in that I have a great data service provider and I know how to set up a reliable network in my home to support vonage's service. Vonage has been as reliable as my old copper based telco and with better phone signal quality. Just started using Vonage Mobile using my ipod touch and it is remarkable how clean the sound is. VoIP should be installed by professionals, this is were Vonage needs to go. VoIP is only as good as the WAN/LAN connection is.