I purchased a Rift S to see if the visual quality and improvements in SDE were better than the CV1 to warrant $360.  I have had the CV1 since it came out and have hundreds of hours using it in P3D.  

Setup of the RIft S was very easy.

Visual quality was better than the CV1, but, not by a bunch.

SDE was less than the CV1, but, was still present.  SDE was about 50% less visible.

Rift S was very comfortable, even when wearing glasses.  If I had kept it I would not have needed to purchase prescription lenses for it, just wear my glasses.

I use a DOF Reality H3 motion platform.  One of the issues with VR and motion platforms is the VR's loss of its home position with movement of the motion platform.  I was hoping the Rift S with its inherent tracking cameras would not suffer from this loss of home position.  Alas, the Rift S was actually worse than the Rift CV1 with its towers.

With all that determined, I decided the Rift S, while an improvement, was not enough of an improvement to warrant spending the money.

 

I considered building a VR motion platform.

It occured to me that the seat would have to have a large panel at least attached to the platform

in front of the seat with a high contrast pattern on it other wise the inside out tracking of

a VR headset might interpret the platform motion as head movement.

 I don't think that would work.

Any after discovering that headsets typically use accelerometers as well as as cameras I decided to shelve the idea