What do you want to hear? He was judged twice National Champion Stallion of Germany with the highest marks at this time, won the get of sire class on many occasions, sired equally good sons and daughters, sired countless champion horses (Er and sE) and was one of the most successful sires in Germany. His sons won the stallion licensing, were good performers at the stallions performance tests and went on to become good sires in their own right.
Yes, he had pigmentation problems like most horses of this line and hadn't movements like a Gotthardt. That's the more negative side.