AudioPrism CD Stoplight & Auric illuminator work?

I burn a lot of compilation cd's for my car. I use the Auric Illuminator on those. It improves the sound of cds in my car. Not as harsh or cold sounding. I don't use it on the originals.

I've used Auric Illuminator on discs that are damaged / hard to read or have very poor "digital" sounding recordings. As a general rule, i don't use it unless the disc has either or both of the aforementioned problems, but it has made discs that were previously unreadable or unbearable to listen to much more usable and enjoyable.

I am not a "believer" in markering discs for multiple reasons and therefore do not use them on my cd's or dvd's. Sean
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I've used Both and have had Positive results from them (remember: these types of "tweaks" make just little audio differences)!
1)By marking the inner circle and outer circle of each disk with the Marker (black)-I have experienced less grain and harshness and a little more OPEN presentation(mostly heard in the upper high freq.)with that treatment. 2)Cleaning a disk with the Illuminator Solvent slightly demagnatizes the surface of the CD and also makes it more reflective for the laser reading of the CD info. Reason for 1)& 2): Reduces stray laser light and demagnatizing the CD will allow the laser, reading the CD info., to have less error corrections(jitter)in the process procedure, i.e. more musical info. Have you thought about the Bendini Ultra-Clarifier (it works also, does about the same thing-I have 1)- read info. at :www.bedini.com
Good Luck and Enjoy!