Player Review
90 - CL SBC
So your main question is: is he worth doing? My anwser would be - of course. For around 120k you are getting an end game player rated 96 on CF with maestro chem. style. I managed to lower the cost of Benzema with some untradables to only 40k. First thing I did was moving him to a CAM role in a 4-3-3(4) tactic. The main aspect I directly noticed was his ball control - it is like he has a glue on his feets. Because of that he feels much faster than the card would suggest. Another noticable ability was his shot power which was really powerfull (99 with maestro). Last but not least are his workrates. Med/Low might not seem ideal for you but for Benzema it is. He doesn't go too far in attacking state of the game so he is always available to get the ball and distribute it to others. Big benefit is possibility to strong link him to Bale which I did.
TL;DR
I am really glad I made this SBC and I encourage you to do so if he fits your team.
Ball control
Shot power
Strength
Positioning
Nationality
No cons