"First-class breeding model.  Best possible total framework, excellent, strong foundation, good way of going.  Optimum breed quality.  By his 6 sons and the large number of study book daughters, one of the most important stallions in the post-war Trakehner breed.  Mackensen passes himself down generally quite reliably and stamps his children.  Now and then a certain variance in framework, size and caliber is to be observed as inherited by the dam.  In the elasticity of the movements and regarding the body connection, usually satisfying.  In their nature Mackensen's descendants are simple and pleasant."  German Trakehner Hengstbuch