I have mixed feelings, I watched Madrid - Barcelona and he was beyond terrible there, too slow to catch any of the graceful Barca players. I really think Juve should invest some money in a solid central defender,yet again they have to strengthen almost all areas and I doubt there are enough resources to cover all them up.
On the other hand, as some posters mentioned above, even at age of 50 Canna will be better than Mellberg and Legro, so go figure....