I've been using Vonage for nearly a year now, with no troubles whatsoever. I've even switched cable companies and states (moving from NY/Earthlink/Time-Warner to NJ/Comcast), the biggest problem was actually getting Comcast out to the house to hook up the cable modem. Once they were done, I plugged in my ATA, and my phone service was up and running. I've got phone numbers in two different area codes, for an extra $5 a month. The features just keep on getting better, with caller ID w/name now available nationwide (free). All the little extras that the phone company uses to jack up your bill are free with Vonage (Caller ID, Call waiting, Call return, voicemail, etc.). The internet interface is great too. Just point and click, and all my calls can be directed to my cell phone if I'm going out, or you can have them ring simultaneously at two locations, in case my wife might be home (or might not be). I've only had one occasion where I've lost service, and that was because of Comcast. The calls rolled over seamlessly to my cell phone like I'd set it to. The callers all thought they'd reached me on my home phone.