Wow, some of these reviews are disgusting... this is a service that provided for FREE. YOU CAN MAKE FREE CALL W/IN THE US!!! WHATS TO WHINE ABOUT? SO WHAT IF IT HAS A SHORT 20SEC AD, I WOULD WAIT 1MIN TO MAKE A FREE CALL W/O RESTRICTIONS. THESE DAYS NOTHING LIKE THIS IS FREE AND THERE ARE PEOPLE ON HERE THAT COMPLAIN? I DONT EVEN KNOW WHAT TO SAY...DEV, I APOLOGIZE FOR ALL THIS UNGRATEFUL PEOPLE. I HAVE NEVER HAD A PROBLEM INSTALLING OR USING THIS PROGRAM. IT IS FLAWLESS FOR ME AND IM GRATEFUL FOR THE PROGRAM. Im glad I could get rid of my 2nd cellphone that I use mainly when Im home. Ive tried Vonage and GTalk but nothing was as simple and user friendly as this app. Maybe it only works for Apple people. Pros: 1) FREE 2) No restrictions when calls are to and from US, no restrictions on mins unlike most other programs. 3) Clarity 4) User friendly 5) Can use anywhere there is WI-FI or 3G access 6) No monthly fee. 7) Versitility- can use on all Apple devices and Windows(have not tried). 8) Can make calls from MB Pro and iPad at the same time(same number shows up). Cons: 1) 10sec ad(which I have no problem dealing with...) 2) No VM (that I know of...) 3) Doesnt work on Andriod devices. 4) Intl rate are more expensive than Skype but does not provide free calling anywhere. ALL IN ALL A GREAT FREE PROG!!!