ok..
ive driven a few cars. with the 3 variants of tein comonly available.
superstreet. abit firmer then stock,good solid feel.(on a evo 9 its actually less bumpy than stock )
flex.. quite firmer than stock. abit choppy
mono flex. about the same firmnes as flex but without the choppyness. very good feel.
to be honest i was very impressed with the mono-flex. id of thought they would be bouncy as. no bumping around at all. just good solid feeling suspension.