Anyone who has been reading this blog, or many of the Vonage forums very well knows about the patchy nature of the Vonage VoIP service. If you have used it, you have experienced the issues with Vonage first hand. Perhaps that is why I was surprised to read that PC World had named them their VoIP service of 2006. [Just updated the link. Sorry about that. They link Vonage profile to an old 2004 story, which is what I originally linked to! I have updated the post to reflect that.]
PC World in an older article said that Vonage set-up was easy, which is still pretty accurate. But then they praised their audio quality, and their support website.
I bet there is a lot of customers who disagree. One of the common refrains about the company has been its customer service. Regardless, I think the reason to use Vonage, if you have to is their softphone access, and using it as a back-up, especially when you are on the go.