Entrainment -Why do it?

I became interested as I realised there were days when I felt "on top of the world", vibrantly alive, very creative, insightful and generally very productive. Unfortunately, these times were elusive and I seemed unable to predict or control when they would happen. I'd heard of meditation providing similar benefits but hadn't found the time to put into it (I have a young family). When I came upon brainwave entrainment, it appeared to hold many of the same benefits as meditation without taking years to become proficient at it.

There also appeared to be some sort of rational explanation (unlike meditation), which at that time, I needed.