I tried Magic Jack about a year ago, It didn't work very well for me. I was unable to hear some callers. I then gave it to a friend to try. He had very good results with it, He said he had to turn off the screen saver on his computer to get it to work right. He then bought one for himself and gave mine to someone else to try. They also ended up buying one. So far about 4 others have used the one I bought and ended up buying there own, So I guess it has some potental.