First the good stuff. This is a neat little application; and the developer seems to be very supportive and attempts to solve any problems. If you need to send international SMS, it may be the best product I've seen. Now for the issues. I live in the USA and have a ported number. When I couldn't receive messages, the developer did fix my number; but what about other ported numbers I send messages to? What if they never know they didn't receive one? Also, I use Verizon Wireless; and any REPLIES I send are not received. (Of course, I could start a new SMS to the sender; but that's another aggravation you have to hope people remember to do.) This application started me on the road to find a great solution. For me, since I don't need to send international messages, I simply use iChat to send AIM to mobile phones; and they can reply just fine to iChat. When I leave home and have not received my replies, I just turn AIM on in my mobile phone and my replies are delivered that way. This works well; and I don't have to rely on people remembering to do the correct thing to reply to me. THIS IS A NEAT LITTLE APPLICATION THOUGH.