The striker has joined the Bianconeri on a free transfer after his contract at Athletic Bilbao expired.
"It is a magnificent, an incredible group," he told the Juventus website in a club video. "It has been a real surprise.
"It's not something you'd usually find in a team with such great players," added the outfit's new centre-forward.
"Perhaps other teams have excellent players like ours, but it's different here. Everyone is friends and great teammates. I feel really good here."