Mike,
I have had Vonage for about 2 weeks now. I have been in the process of moving for the last 30 days and had to get a new phone number anyway due to an area code change.
Anyway - I decided to start with it at home first - then put it into my business if I liked it.
The good:
- Very easy to setup
- Unbelievable features for no additional charge
- I get my voice messages in my email (FINALLY I have a unified messaging center!!)
- When the Internet goes down - my system automatically rolls to my cell phone
- Great web site features
- Cheap additional local numbers in other cities
- Unlimited domestic long distance
- Cheap international rates
- Great customer service
The bad:
- I can't get DSL without a phone so I had to get Cable and I have not found Cable to be as stable so far as the DSL I had (Charter has been out 2x to fix it)
- 911 service is a little sketchy (have to set it up after the fact and separately)
- When I download a big file I can tell the phone quality is going down
- Getting it setup with my particular combination of networks, routers, firewall, etc was a little challenging. Best to feel pretty comfortable with computers and your firewall settings.
- You are relying on power for your phone to work (and internet for that matter)
Overall - pretty happy with the company, very happy with the service, and pretty happy with an IP phone. Not for people with no extra cell phone and no patience for dealing with occasional computer/network/other headaches IMO.