I've been using them for about four months now. Worth the price, but don't expect it to equal traditional land-line service for voice quality. Can't compare it to any other VOIP service as this is the only one I've ever used. The hardest thing to get used to is, when no one's talking, the sound drops out completely and you'll think it's dropped the connection the first few times that it happens. The sound quality is pretty good most of the time, but you will be able to tell when the network is under a heavy load.

We went for the $199 one year prepaid option with unlimited long distance. About one fifth of what we were paying Bell$outh at the time.