LAST record preservative improves the sound

Seriously. I just applied it to 50 LPs of various quality recordings and genres and in every case there was a subtle but noticable improvement in clarity, especially in upper mid-frequencies and a little less in high frequences, but also some improvement in pace and dynamics. The records were very clean before the application, I did not clean them again prior to applying the LAST. Mostly original Japanese vinyl from seventies but not only, vinyl condition varies from NM to VG. I am impressed. This confirms what a man from the Needle Doctor said when I asked him.