Yo Dan!
I will say that I was very intrigued by this product after reading your post. A couple years ago, I researched and eventually purchased a record weight/clamp, but had never heard of an outer periphery ring, until now.
So, I went to the Wayne's Audio website
www.waynesaudio.com to see what it is you were so excited about. Well, it turns out that Wayne is located in Pomona which is only about 30 miles from me. I reached out to him to see if I could come over for a demo and he obliged. I must say, Wayne is an incredibly nice guy! And, he has some pretty killer gear..... The MBL Radiostrahler's sounded pretty special!

Long story short, I purchased his SS-2 and brought it home. After three hours of album listening, with and without the outer ring, I decided this thing is a keeper and I will no longer play an album without it in place. As Dan mentioned, the improvement is distinct. The bass is certainly improved and going back and forth made it clear to me that across the spectrum, the overall dynamics are much improved with the ring in place. I don't have any grossly warped records, but just purchased the newly released Anthony Wilson "Songs and Photographs" album (which won the Arya Award for best audiophile recoding of the year from the LA & OC Audio Society). It, like many great and news manufactured albums had a very slight "non-flatness" to it. I would not consider it a warped record but enough where you can see movement of the cartridge. Anyway, with the ring in place, perfectly flat record with no cartridge movement at all. So, you get a very consistent VTA which is not the case when there is any up and down movement of the stylus on the record during playback. The ring is heavy at 3.8 lbs and not only makes the record flat, it does a wonderful job coupling the record to the platter, which is obviously having a possible influence on the SQ.
While it is not cheap (on sale at the moment for $550, it is cheaper than competitors products by a large margin), it was an upgrade to my TT rig that was worth every penny. Thanks for the recommendation Dan!