Any thoughts on coaxial speakers,for S.E.T. amps

I have been reading quite a bit,about some of these fascinating designs,like the Ocellia,Aures,Auditorium series,amongst others.From my limited(but very good)experience with some standard speakers(with high sensitivity),I am fascinated with the Coaxial concept,and the SET amps(like Shindo,etc)used to drive them.They are supposedly a bit "differtent" in presentation,yet wonderful to hear!This interests me,and would LOVE some feedback.
Thanks in advance!