I bought this because the optical drive on my Mac laptop started kicking out the disks. I read that the cure could be as simple as cleaning the drive, so I gave this product a shot. It worked fine at first  and I was able to use my disks. The next time it kicked out again, so I tried the cleaning disk without success. In the long run I bought an external drive rather than try to open my laptop and replace the bad drive. The external drive works well and I still have the cleaning disk just in case. The disk has tiny hairs on it to whisk the dirt away (at least once). I can use the external drive on any other computer with a USB port. All's well that ends well.