He does well when he can purely concentrate on the offensive side of the game. The poblem I have with him is that he's awful defensively, and I'd rather have a wingback that's solid at the back but doesn't contribute going forward than a wingback like him, going forward well without really being effective (I doubt he even has 5 goals+assists in a Juve shirt), and a constant liability at the back.
Hence why I prefer Peluso, nonwithstanding his woeful offensive work.
Against a mediocre side as todays Trabszonsor, with a two goal lead in hand Isla is however clearly the better choice.