If anyone is in the Miami,Fl area, there is a very nice Karsh exhibition at the Lowe Gallery on the University of Miami campus. I saw it at the opening about a week ago and it is certainly worth seeing.
We should not be too harsh on the portraits of Karsh as presented online and in some editions of his books. To appreciate him without seeing original prints, try to locate the first edition of Portraits of Greatness printed in Holland and published by Thomas Nelson and Sons in 1959.