During his time at Arsenal, he highlighted the many attributes that led an elite club like Barcelona to desire him.
When a new player arrives, however, the question is not if he is truly any good.
The question is: Is he any good for the club? What does he add or bring that the team needed? Why Song over another midfielder?
Song has yet to play with his new teammates enough to determine exactly how valuable of an asset he is, but his play at Arsenal does allow for insight into how he will fit into this team.
Here is what Song's arrival means for the Catalan club.