Reading Czerny's story from his own recollection was interesting.  It seemed sincere, he was a great teacher and musician but he didn't need to wear it on his sleeve.  I guess he learned his lesson liked he mentioned when he got in trouble with Beethoven.  I also loved his description of Liszt!  He says about Liszt, "while playing he swayed on the chair as if drunk so that I often thought he would fall over." (105) This little excerpt along with the other things he writes about Liszt were most interesting.  I have to admit I do not know much about Liszt but from reading Czerny's description of him he must have been an extremely gifted man.  I also thought Czerny was insightful in his idea that he should instill in Liszt a good habit of solid technique.  Geniuses mental gifts are ahead of their physical strength so they then tend to slight solid technique says Czerny.  

I imagine that Czerny must have been a great teacher.  His chapter on expression in his treaties and the knowledge of music he possessed was impressive.  What he writes I think can still be applied today in our studies of those past composer and musicians. As well to twentieth and twenty first century music for Czerny says that what my be sufficient for one piece is not for another.  

In addressing chapter 8 and Logier's invention of the Chiroplast it sounds as of his intentions were good in wanting to improve wrist motion but I have to agree with the skeptics.  I think it would be better to have a good and careful teacher who instilled solid technique into the student.  Plus taking Engel's point into consideration that it is not always good to hinder movement.  The freedom of movement can help us with the expression of a piece.  If one has a stiff touch expression my be cramped.