The first thing I did was play one of my favorite SACDs: Virgil Thomson's The River and The Plow That Broke the Plains - Leopold Stokowski conducting The Symphony of the Air. Then I removed the SACD, treated it with CD Stoplight and waited the required 5 minutes for the ink to dry and put it back in the player. Right away I noticed a considerable increase in volume! Once I lowered the volume to a level comparable to the before treatment level I also noticed the bass was warmer, the performing space was "airier", the outline of the instruments seemed more defined and the dynamic attacks were sharper. It appears to smooth out the sound, increase ambiance and make percussive attacks more exciting. All this from a green ink ring around the outside of the disc, amazing!