Well said, XDR, but new tech is always derided by some, at least initially.
TDR, I'm not sure what ergos work for bad knees, thankfully!, but it fits me pretty well with my 34" inseam. It also seems to have proper springs for a rider weight af about 200+ lbs?! The handle bar clamps are adjustable front to back in 4 positions, much like a KTM. The seat feels a little like a KTM too (hard)?!