Anybody using the last record preservative

Last is supposed to reduce friction between the vinyl and the stylus.  Several such record treatments are supposed to do the same. The old "Sound Guard" was a dry lubricant designed for the same purpose. 

Whether any of these products work to reduce wear is something I don't know if this has been demonstrated.  When i comes to long-term effect, it is probably even harder to tell.  How long does one wait in such a comparison?  Could the product ultimately reduce record life if it unfavorably alters the record surface in the very long term?  So far, records I have treated with LAST or Sound Guard are in good condition, but, so too are records that have not been treated.

I begun using it more than 20 years ago.  It seems as though it reduces friction and can be perceived in the sound.  Seems to reduce groove noise.  I can't say as to whether it reduces record wear, but theoretically, it should.  I like the product.

I'm a fan. Have "Catch a Fire" by the Wailers with the old Zippo lighter cover. Treated 30 or so years ago. I've had the album 50 years. Sounds spectacular. 

I have been using last record preservative for… hmmm, I guess more than thirty years. All my albums are treated (2,000).
 

My methodology is to clean with Last Power Cleaner before cleaning on my cleaning machine, then apply LAST. Most of my albums have been cleaned and treated only once. 

Then Last All-Purpose cleaner before playing each time to get the dust off.
 

Back in the vinyl days I put all new records through the Nitty Gritty first, then treated with LAST & stored in MHS archival sleeves. And so they remain today, nothing being spun more than once a year barring intoxicated visitors. Sounds like little has changed, LAST still around -- those big wide brushes too?