Brainwave entertainement has a measurable effect on your brainwaves.
If you want to learn what brainwave entertainement is you would recommend you to visit
transparentcorp's FAQ (Frequently Asked Questions) .
The marketing of centerpoint is certainly a bit suspect and Brainwave Entertainement is no magic pill that will instandly solve your problems.
Whether something has subliminar messages as a "bonus" doesn't really matter. The only effect of subliminar messaging are placebo effects.