Instruct: Classify a review as either positive or negative.
Query: I can't believe this works

Wow, even in possibly lower quality mp3 format this worked very well for me. Immediately upon putting my headphones on I felt my mind clearing, and I was able to focus more easily and for a longer period of time. I was really reluctant to buy the CD, because the whole notion seemed sorta gimmicky. But hey, I'm a believer now. You really do need to wear headphones to get the most out of these, and I'm planning to rip any future CDs I buy in a lossless format.Seriously, give it a shot if, like me, you have difficulty focusing on work at times.