At first I have to say, that he is the best leftback I have used this year so far. I prefer him over players like Marcelo and Alex Sandro.
He is an very complete leftback, who can do literally everything on the Lb-position. He did even score a screamer for me with his 75 long shots.
One very similar player is Alex Sandro but I prefer Telles over him, especially because of his low Price
Height+Jumping, he did win most of the headers for me, even against bigger oponents
Pace, he can keep up with literally everyone especially with shadow chem-style
Defending, very good tackles are one of his major advantages
Crossing, very good crosses on the head of my Arnautovic inform
Shooting is very good for a fullback
Had to think long for some Cons and could only find two little cons:
His strength, he could get pushed of the ball quite easily when I wanted to get forward with him.
Maybe his League but there are some good Links to him like Danilo Pereira and Felipe, but he has a strong nation.