This cleaner is well designed and is easy to use. There is an impressive test verification procedure on the product that works well. I was having a problem with CD's skipping and after using this cleaner the problem continued, however I did find the real cause and easily corrected it. I had taken the PC burned music Cd's out of my 2001 Camry changer when I recently traded it for a newer Lexus ES series and although they played perfectly in the Camry they skipped and cut out in the Lexus. I ran the cleaner with no improvement, but after researching further I learned that CD's created at a fast burn rate can cause this problem. I burned new ones at 4X and problem solved. I am very pleased with the Alsop cleaning disc and will use it to clean our computer drives and DVD players as they need attention also.