TIGER PAW "Tranquility" (Magnetic Bearing Repulsion...) Any Good?

I have a great deal of experience with this as it is a key feature of my turntable bearing design. Relieving the platter of much of it’s weight reduces friction and thus make the motor work less. This frees up motor torque towards driving the friction in the record groove. Subjectivity less bearing friction often results in a "faster" sound as described above. A test for this is to spin the platter to 33.3 rpm without the belt and time it till it hits zero, then do the same with the magnets to measure the hopefully lower friction. My tables on a good day will run over 7 minutes for example.
Regards
Bruce
Anvil Turntables

As far as stray magnetic fields are concerned there is a shielding effect when using opposing magnets but you still have stray fields And the only thing that will disrupt them are iron and nickel alloys.  Certain cartridges near moving magnets can hum but I have NOT seen this design and the manufacturer probably accounted for it. 
Also, regarding speed you will have less belt pull and wow flutter and drift should improve with ANY controller.

I am trying to understand the comments which seem to discuss the concept of 'slippage' due to magnetic coupling.  Either I am missing this or they are.  There is no magnetic coupling between the subplatter and the top main platter.  The platters STILL are on top of each other.  All that the magnets do is to introduce an upwards LIFT to the ENTIRE assembly.  The main platter still FIRMLY sits on top of the subplatter.  So, how is it possible to affect the speed in this scenario ?  If the subplatter turns, the motion is 100% transferred to the main platter.  There can NOT possibly be a slippage between them.

Please explain....

If what you say is true there is no issue, but unless I misunderstood, Daveyf’s post of 6-16-2018 suggested the drive is magnetic a la the Transrotor TMD system. Sorry if I and others got it wrong.

The slippage issue arises with *opposing magnets* such as mag lev devices. Thecslippage occurs due to magnetic field forces in the horizontal plane. There are obviously also magnetic forces in the vertical direction. Since some turntables such as Verdier employ mag lev one assumes slippage can be overcome. But generally, slippage for mag lev is controlled by having “stops” in place so slippage won’t result in the top plate slipping too far. One also assumes in the case of a platter suspended by mag lev slippage will occur on start up but won’t occur after the platter reaches speed due to friction. But I’m guessing a little bit at that last point.