A view on Daniel Gudjohnsen from someone who watched him every game:
He looks like a classic striker that have it all: tall, (sometimes) scores goals, good technique, some cocky aura, winning some duels, can make some good pressing from time to time. He is quite slow in running, but if he can make it all work he will be in a top club quite soon.
But his attitude is his worst attribute. He does two-three good things in a game and thinks that is good enough. The coaches sometimes yells at him for not doing enough hard work without the ball. He has barely scored a goal in the last year.
If he starts to take everything 100% serious everyday, which is his biggest problem, he will go far and Bielefeld will only be a station towards something bigger. But if he continues with this attitude he will be frustrating and you will let him go.