I did not like Boateng for the last 3 years, but this card for me has been fantastic.
Height + Physical - 6foot4 with 91 strength and 75 jumping!? Madness for normal defending, and it helps protect you from some BS corners. (You will still concede some.)
Defending - Tackling and interceptions this guy is a monster. Stand or slide its all good, he can reach for the ball where you don't expect it.
Passing - Very good passing to start off attacks.
Pace - Decent pace. More than enough for the time being.
Agility + Balance - for loose balls in the box he is a pain. Yes he has good reactions and decent composure, but if you need to turn him around then you have likely conceded. Can be slow in this sense.
Scoring - Normally my CB's get a couple goals during the WL, however Boateng didn't. I'm sure he will in future but he isn't that much of a factor offensively from corners (surprising tbh.)
Value - expensive for a CB, not horribly but for a casual could be difficult to afford.