You guys aren't really understanding the CD/Vinyl Optimizer or giving it a fair shake: it was easily the best money I have ever spent.
What most people don't realize is that, both CD's and vinyl are physical media, with imperfections on each surface. Neither are perfectly flat planes: both the laser reader and the vinyl needle end up coloring the sound in different ways. For the CD, the reflected laser wavelength shifts slightly as the CD spins, causing a smearing of the high end frequencies. For the vinyl needle, the upward travel of the needle causes compression of the needles surface, causing the same compression impacting the midrange of the recording.
Fortunately this product solves both problems: it is created by cryogenically treating a rare-earth magnet down to near absolute zero, and bringing it back up to temperature slowly so that all of the magnetic poles are perfectly aligned with the bottom of the magnet. When it is placed on the surface of the disc, the magnetic field causes the electrons in the material farthest away from the magnets surface to 'swell' into a higher valence shells, meaning the laser light no longer has to travel a farther distance before interacting with the digital data, meaning the smearing of the highs is resolved. On the vinyl media, a similar thing happens, in that the needle can ride along the 'swelled' media, therefore no longer being compressed in the midrange.
Of course physics must be observed, which means that energy cannot be created indefinitely, which is why the effect is only temporary. In fact, if you are a prolific listener and lover of music, it behooves you to buy at least two, or possibly three, and cycle through them. Fortunately, the energy imparted onto the disc will be replenished by the Earth's natural magnetic fields, but that takes time. If you own three, you can cycle between each one every 6 hours and always have the best effect of the media. Thinking more, it's probably better to own six, or two sets of three, one set for vinyl media, and one set for CD media.
If you want the ideal listening experience, it would be best to buy a single optimizer for each vinyl disc and CD you own, because the magnet will attune itself to the individual characteristics of each disc and record, and you don't need to worry about depleting individual optimizers and will always be ready for the most pristine listening sessions.
Half of you people commenting have no experience with the product, and don't understand the physics at work here, so we really can't take your nay-saying seriously. My Hana-Microline vinyl cartridge cost over $3k, and there's no way I would put it on an untreated disc and suffer listening through congested midrange!