I agree with this. Several years ago, when I was first diagnosed with depression and having trouble with insomnia, I bought a StressEraser. When I used it regularly (pretty much daily), my overall stress level decreased and I was able to sleep more soundly. Using it intermittently at the moment of insomnia had much more limited success.

By the way, based on my limited experience between the StressEraser and the device used in this practitioner's office, I found his device much more helpful and relaxing. It was this gadget:

http://www.heartmathstore.com/category/emWave2/