I had a pretty bad experience with Vonage. So much so it almost made me like the regular phone company! They claim you can use your existing phone number and that you can try them "risk free" with a money back guarantee. Unfortunately, I found out (after bugging their customer service), that I had to either switch numbers or disconnect and then reconnect my DSL. I decided to cancel my service, but ended up paying over $100 in activiation, monthly and cancellation fees.I did eventually get part of my money refunded, after contacting their customer service several times, but considering I never got to make one phone call with them, it was pretty discouraging. This may just be my experience, but definitely read the fine print.