I bought one but haven't used it(Skype works fine for me).
You might want to check out these sites
http://magic-jack.pissedconsumer.com/
http://patphelan.net/magic-jack/
Or just toss "Magic Jack reviews" in Google
yes, that was what he said. he is going to try it on a old computer first. he lives way out in Bum---- Eqypt and is in a incorporated area that charges way too much for phone service.His neighbor has been using for quite a while. thanksDont forget that competitors usually post false claims against each other on sites on the internet.