What do you mean by "any"? He was good enough to be a long reigning champion and have legitimate good wins over Prince Williams and Rocchigiani.
Here's some footage of him against Rocchigiani (the second fight, I believe): [yt]4b4UmQhyOmg&feature=related[/yt] [yt]QWV5R6v5m80&feature=related[/yt] [yt]zHaeQmZ01Mg[/yt]
Coming out of Germany I more or less grew up seeing him fighting. He was one of the guys getting me into boxing. He was a very good fighter but not a great one. At his time Roy Jones and Dariusz Michaelchewski were better, Virgil Hill and Graziano Rocchigiani were as good as him. He got a gift against Rocchigiani in the first fight but dominated him in the rematch. Great comeback after beeing retired for 10 years against an old Virgil Hill who still was cruiserweight champ at this time. He beat him soundly and looked very sharp and good in there avenging the only loss of his career. Would he be around today he would be up there with Dawson perhaps even above him. Good technician and tactician. Good defence, footwork and jab. No puncher. Eastern European style. What´s more important about him than his fighting ability was that he catched the imagination of the people in Germany. He became the symbol for German reunion. And made boxing big again in Germany - and since boxing is on the slide in the states but on a constant rise in Germany (40% of German´s housholds watched the Abraham-Taylor fight, Kilitschko fights have constantly about 18 million watchers (from 80 million people)) you could say he was important for boxing.
I'm anxiously awaiting the great Kraut Scourge of 2015. For a nation that seems to be as interested in boxing as it is, sure is taking a while for Germans to pick up the sport.