Borriello is decent, he wasn't that bad last season, 17 goals is a good outcome from someone like Borriello. But he shouldn't be at Juve, if Juve want constant Champions league football the likes of Borriello shouldn't be in the squad.
Never understood the point of this signing, it's not like Juve need any strikers. Now watch Marotta sign the full deal.
Just like Quag and Matri were first on 'loan' then signed, I can see the same happening with Borriello.