He's a good little player. Very pacy, very direct and a decent dribbler.
He's got little or no end product though, his crossing is abysmal to say the least and he does everything right but deliver the right ball.
He'll do the job against tired defenses. Exactly why he was used mainly as a substitute in Germany.
He definately has the talent, but still has a long way to go. Both, in terms of experience and in terms of quality.