I love these guys. Started using VoiceGem in beta a few weeks ago and can't stop. I am now using this with my family, who often try to reach me with no luck. The benefits are obvious - you don't have to respond to voice calls. There's an expectation on the sender's end that you will respond, eventually, but you can be in control of your time. Unlike a regular voicemail, this also allows you not to talk to the other party in real time, thus delivering your message to them, but on your time. Seriously, just try it, you'll fall in love with the app.