Like the Sleep Aid, the Insomnia Aid is also not a subliminal program. It is a single brainwave entrainment program that is designed to act more slowly and last longer than the Sleep Magic sleep aid. It is a 79 minute program, and will drop you into a very deep level of Delta sleep before fading away to let your brain cycle normally through sleep. It is very, very relaxing.
If you have epilepsy, please be aware that because this program uses rhythmic sounds, you should consult a physician for advice before using it.