I've had this app for a couple of weeks, and I bet I use it at least 10 times a day. What a brilliant idea. A lot of the utility is also available in iMessages, but BeamApp works smoother.
In iMessages you first have to either enter your iPhone number or look it up. In BeamApp it's all preconfigured.
One feature I really like is beaming a URL from the iPhone to the Mac, as BeamApp actually opens up web pages for you on your Mac so it's ready and waiting on you when you get back to the Mac.
Just today I updated so I can now send text back and forth between the two devices. Who knows what's next.
The BeamApp is yet one more reason to get an iPhone and a Mac.