Surely a joke?
He's obviously a potent goalscorer, although even then that's only been this season, and in the Portuguese league.
But even his highlights betray a slight clumsiness and average technique. The ball is never fully under his spell. Genuinely worry that premier league defenders, much sharper and faster than the ones he's used to, will be forever intercepting and disrupting his game.
I'm not saying he's a bad player - he's obviously a promising striker and even considering his limitations I could see him scoring a decent amount of goals here. And he would physically be up to it anyway as he's quite fast, strong and has intensity to him. But he's not going to be winning Ballon d'Ors that's for sure.