He's also one of the most clutch players in football as well, showing up on the biggest stages even when he was very young.
-DFB Pokal top scorer in 09/10
-Golden boot in WC 2010 with 5 goals and 3 assists at age 20. Scored in round of 16, quarters, (suspended for semis), and 3rd place playoff against England, Argentina, and Uruguay respectively.
-Scored in CL final 11/12, would've scored in the 12/13 CL final as well if it weren't for an unbelievable Subotic goal-line clearance
-in the 12/13 campaign he scored in quarterfinals vs. Juve, 3 goals and 1 assist against Barca in semis with absolute dominance, and a crucial penalty in the DFB Pokal final
-Hat trick in WC 2014 opener vs. Portugal
-Scored vs City away in CL, scored in DFP Pokal final vs Dortmund, top scorer of DFB Pokal in 13/14
All of this and he isn't even 25 yet. If you were to judge him on overall abilities he isn't one of the top players in the world but in terms of delivering goals when you need them he's one of the most elite. I doubt he'll decline as he ages as well, considering his game is built around off the ball positioning and his own intelligence/anticipation. His game isn't about aesthetics but he is so brutally efficient, it'll be interesting to see how far he goes.