The tranquility is magnectic and produces an upwards force on the platter, so "lightens" it by virtue of reducing friction on the thrust plate at the bottom of the bearing.
There is another effect that I can't get my head around and despite searching, can't find any useful explanation online. Because lines of magnetic flux are repeatedly made and broken as the platter rotates, that takes extra force/energy - that is simple and inescapable physics - tha gets nowt for nowt in this world, also an inescapable fact of life and physics.
There were a very few that appeared for sale around £200 when the new bearing arrived, but there were rather few, and I missed them, but would like to try one, even though I now use a Hyperspace in preference to my LP12.
If it made 10% the difference of the move from a felt mat to using tiny pieces of sorbothane to support the record, I'd be more than well impressed.