So first of all, I have 2 'OP' left backs. I have Alonso (EL card) and this Robertson. They are completely different. Robertson is small and not that sturdy, and Alonso is high and very firm. But I prefer Robertson. And this is why:
He is very, very fast and he can follow everyone. Very good!
He is a defender, I am not judging that.
Amazing short and long passing. And he's crossing, my lord that's brilliant.
Fast moves and good speed, but his 3* WF is meh.
No words needed, he is an amazing left back. He can do everything.
He is short, and that makes him a little bit too weak. Unfortunately...But the rest is good enough.
Amazing left back, but be prepared that he is weak.