I have also used the Jeffrey Thomas CDs (had some since last century :) ), and the definitely help me to fall asleep, especially if my mind is over busy at bed time. But sadly they don't fix my sleep disorder, which is still mainly undiagnosable by the sleep doctors. I do use them if I am having problems falling asleep; it's just in my particular case they don't help my sleep quality (I'm a rarity with my sleep disorder, so don't base whether you try them or not on the fact they didn't help my disorder). The brainwave entrainment CDs are definitely good, in my opinion, if you have insomnia, stress or just plain bad sleeping habits. When I am restless, these CDs definitely help me to fall asleep.