I have had Vonage for several months now and am pretty happy with it.   Seems reliable enough and I really like the ability to get voicemail and configure call forwarding online.  Of course for a guy like me a couple tin cans and a string would be good enough cause I simply detest talking on the phone.

I did have one problem with the downstream devices not getting a signal from the Vonage device but rather than messing around and trying to figure it out I just put a dumb switch in between my cable modem and the device. This way if my wireless router has problems my phone works and vice versa.

What's funny about this and every other hardware device (or piece of software for that matter) is that as a home user I have literally no patience for failure where as at work I will spend hours and hours trying to get to the bottom of an issue.  Had the dumb switch not have worked I would have thrown the Vonage device in the trash and stopped the service. 

I'll have to talk about my experience with Ultimate TV in a future entry, but for now I'll say that football season is not a good time to mess with my TV viewing experience by forcing a patch down my throat!!