I honestly couldn't tell you about how good he is. But when I watch the likes of City, Liverpool, Barca and what not, there full backs are vital to the attack and technically very good footballers which we lack massively.
If he has quality then i'd happily see him over Bellerin.
Yeah, but maybe not go for average to solid castouts from top clubs. And PSG arguably have the worst set of fullbacks of those big clubs.
Liverpool, Barca, Real, Bayern, City don't go for players like that. We shouldn't either.